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DATA SHEET
MOS INTEGRATED CIRCUITS
µ
PD784935A,784936A,784937A,784938A
16-BIT SINGLE-CHIP MICROCONTROLLERS
DESCRIPTION
The
µ
PD784935A, 784936A, 784937A, and 784938A are members of the
µ
PD784938A Subseries in the 78K/IV
Series. These microcontrollers are based on the
µ
PD784908 Subseries but are provided with the higher internal ROM
and RAM capacities and a ROM correction function.
In addition, a flash memory version,
µ
PD78F4938A, that can operate in the same power supply voltage range as
the mask ROM version, and various development tools are also available.
Detailed function descriptions are provided in the following user’s manuals. Be sure to read them before
designing.
µ
PD784938A Subseries User’s Manual - Hardware: U13987E
78K/IV Series User’s Manual - Instructions:
U10905E
FEATURES
•
78K/IV Series
•
Minimum instruction execution time:
320 ns (fxx = 6.29 MHz)
160 ns (fxx = 12.5 MHz)
•
I/O ports: 80 pins
•
Timers/counters: 16-bit timer/event counter
×
1 unit
8-/16-bit timer/event counter
×
2 units
8-/16-bit timer
×
1 unit
•
Clock division function
•
External expansion function
•
Internal ROM correction function
•
Watchdog timer: 1 channel
•
Clock output function:
Selectable from f
CLK
, f
CLK
/2, f
CLK
/4, f
CLK
/8, and f
CLK
/16
•
Serial interface:
• CSI (3-wire serial I/O):
4 channels
2 channels
• UART/IOE (3-wire serial I/O): 2 channels
•
A/D converter: 8-bit resolution
×
8 channels
•
IEBus
TM
controller
•
Watch timer
•
Low power consumption
•
Supply voltage:
• V
DD
= 4.0 to 5.5 V (@12.58 MHz operation)
• V
DD
= 3.0 to 5.5 V (@6.29 MHz operation)
•
PWM output: 2 outputs
•
Standby function
HALT/STOP/IDLE mode
APPLICATION
Car audio, etc.
Unless otherwise specified, the
µ
PD784938A is treated as the representative model in this document.
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for availability
and additional information.
Document No. U13572EJ2V0DS00
Date Published January 2001 N CP(K)
Printed in Japan
The mark
shows major revised points.
©
1999, 2001
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EEWORLD
