Z80230/Z85230/L
Enhanced Serial
Communications Controller
Product Specification
PS005308-0609
Copyright ©2009 by Zilog
®
, Inc. All rights reserved.
www.zilog.com
Warning:
DO NOT USE IN LIFE SUPPORT
LIFE SUPPORT POLICY
ZILOG'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE
SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF
THE PRESIDENT AND GENERAL COUNSEL OF ZILOG CORPORATION.
As used herein
Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b)
support or sustain life and whose failure to perform when properly used in accordance with instructions for
use provided in the labeling can be reasonably expected to result in a significant injury to the user. A
critical component is any component in a life support device or system whose failure to perform can be
reasonably expected to cause the failure of the life support device or system or to affect its safety or
effectiveness.
Document Disclaimer
©2009 by Zilog, Inc. All rights reserved. Information in this publication concerning the devices,
applications, or technology described is intended to suggest possible uses and may be superseded. ZILOG,
INC. DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY
OF THE INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS DOCUMENT.
Z I L O G A L S O D O E S N O T A S S U M E L I A B I L I T Y F O R I N T E L L E C T U A L P R O P E RT Y
INFRINGEMENT RELATED IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR
TECHNOLOGY DESCRIBED HEREIN OR OTHERWISE. The information contained within this
document has been verified according to the general principles of electrical and mechanical engineering.
Z8 is a registered trademark of Zilog, Inc. All other product or service names are the property of their
respective owners.
PS005308-0609
Z80230/Z85230/L
Product Specification
iii
Revision History
Each instance in Revision History reflects a change to this document from its previous
revision. For more details, refer to the corresponding pages and appropriate links in the
table below.
Revision
Level
08
07
06
05
Date
June 2009
May 2009
May 2009
Mar 2009
Description
Removed Security Watermark from pages
Minor update to page 107
system update change only - no technical
content revised
Updated document to add 3V product
information
Removed ISO/BSI certification information
Figure 1, 7 and 23 changed 5V to Vcc
Added Z8523L DC Characteristics
Updated Read and Write AC Characteristics
Updated System Timing Characteristics
Updated General Timing Diagram
Ordering Information updated
Updated Standard Test Conditions
Updatred Table 43
Updated Table 49 - min value
Page No
all
107
n/a
Misc
ii
2, 13, 76
78
90
98
94
107
75
78
98
June 2008
04
Updated as per new template and Style Guide. All
Updated
Figure 4.
3
Updated
Figure 38
and Implemented Style
Guide
Editorial Updates
Original Issue
All
All
All
September 2007 03
November 2002 02
August 2001
01
PS005308-0609
Revision History
Z80230/Z85230/L
Product Specification
iv
Table of Contents
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Descriptions 1
Pins Common to Both Z85230/L and Z80230 . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions Exclusive to the Z85230/L . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin Descriptions Exclusive to the Z80230 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Description 8
Input/Output Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ESCC Data Communications Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z80230/Z85230/L Enhancements 22
4-Byte Transmit FIFO Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8-Byte Receive FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Write Register 7 PRIME (WR7’) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
CRC Reception in SDLC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TxD Forced High in SDLC with NRZI Encoding When Marking Idle . . . . . . 26
Improved Transmit Interrupt Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DPLL Counter Tx Clock Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Read Register 0 Status Latched During Read Cycle . . . . . . . . . . . . . . . . . 27
Software Interrupt Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Fast SDLC Transmit Data Interrupt Response . . . . . . . . . . . . . . . . . . . . . . 28
SDLC FIFO Frame Status Enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . 28
FIFO Enable/Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
FIFO Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
FIFO Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SDLC Status FIFO Anti-Lock Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Programming 32
Initializing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Write Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Read Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z80230 Interface Timing 70
Z80230 Write Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Z80230 Read Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Z80230 Interrupt Acknowledge Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . 71
Z85230/L Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Z85230/L Read Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
PS005308-0609
Table of Contents
Z80230/Z85230/L
Product Specification
v
Z85230/L Write Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Z85230/L Interrupt Acknowledge Cycle Timing . . . . . . . . . . . . . . . . . . . . . . 74
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Characteristics 75
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Standard Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Z85230/L AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z80230/Z85230/L Errata 99
IUS Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
IUS Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
RTS Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
RTS Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Automatic TxD Forced High Problem Description . . . . . . . . . . . . . . . . . . . 102
Automatic TxD Forced High Problem Solutions . . . . . . . . . . . . . . . . . . . . 103
SDLC FIFO Overflow Problem Description . . . . . . . . . . . . . . . . . . . . . . . . 103
SDLC FIFO Overflow Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Default RR0 Value Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Default RR0 Value Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Default RR10 Value Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . 104
Default RR10 Value Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
CRC Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
CRC Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package Information 105
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ordering Information 107
Z8523L (3.3V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Z85230 (5V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Part Number Suffix Designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
PS005308-0609
Table of Contents
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