Edition 2003-05
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C868
Revision History:
Previous Version:
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2003-05
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V 1.0
Subjects (major changes since last revision)
Current data updated
Description of I2C included
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8-Bit Single-Chip Microcontroller
C800 Family
C868
Advance Information
C868
• C800 core :
–Fully compatible to standard 8051 microcontroller
–Superset of the 8051 architecture with 8 datapointers
• 40 MHz internal CPU clock
–external clock of
6.67 - 10.67
MHz at 50% duty cycle
–300 ns instruction cycle time (@37.5 MHz CPU clock)
• 8 Kbyte on-chip Program ROM for C868-1R and 8 KByte on-chip Program RAM for
C868-1S
• In-system programming support for programming the XRAM(C868-1R) or XRAM/
Program RAM(C868-1S)
–This feature is realized through 4KB Boot ROM
• 256 byte on-chip RAM
• 256 byte on-chip XRAM
(further features are on the next page)
RAM
256
×
8
Timer 0
Timer 1
8-bit
UART
Timer 2
Port 1
XRAM
256
×
8
I/O
5-bit
Input
3-bit
CPU
8 datapointers
ROM/RAM
8K
×
8
16-bit
Capture/
Compare
Unit
16-bit Compare
Unit
Port 3
I/O
8-bit
Boot ROM
4K x 8
Watchdog Timer
8-Bit ADC
Analog/
Digital
Input
Figure 1
Data Sheet
C868 Functional Units
5
V 1.0, 2003-05