Block Diagram - NEC PD789860 User Manual

1.7 Block Diagram

8-bit
TIMER30
TMI/P21 8-bit
TIMER/EVENT
TMO/P20
COUNTER40
BSFO/P20 BIT SEQ. BUFFER
WATCHDOG TIMER
KR10/P40-
KEY RETURN10
KR13/P43
Remark Pin connections in parentheses are intended for the
26
CHAPTER 1 GENERAL (
CASCADED
16-bit
TIMER
78K/0S
COUNTER
CPU CORE
RAM
(128 bytes)
V V
DD
User's Manual U14826EJ5V0UD
µ
PD789860 SUBSERIES)
PORT 0
ROM
PORT 2
(EEPROM)
4 KB
PORT 4
SYSTEM
CONTROL
EEPROM
POWER
(32 bytes)
ON
CLEAR
IC
SS
(V )
PP
µ
PD78E9860A.
P00-P07
P20, P21
P40-P43
RESET
X1
X2
POWER
ON
CLEAR
LOW
VOLTAGE
INDICATOR