UPD78F9418A NEC, UPD78F9418A Datasheet - Page 117
UPD78F9418A
Manufacturer Part Number
UPD78F9418A
Description
(UPD7894xxA) 8-Bit Single Chip Microcontrollers
Manufacturer
NEC
Datasheet
1.UPD78F9418A.pdf
(319 pages)
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f
f
X
X
/2
/2
f
XT
3
7
Note See CHAPTER 12 COMPARATOR for details of the comparator.
(1)
(2)
8-bit compare register 0n (CR0n)
This is an 8-bit register that compares the value set to CR0n with the 8-bit timer counter 0n (TM0n) count
value, and if they match, an interrupt request (INTTM0n) is generated.
CR0n is set using an 8-bit memory manipulation instruction. Values from 00H to FFH can be set.
RESET input makes CR0n undefined.
Caution Be sure to stop the operation of the timer before rewriting CR0n. If CR0n is rewritten while
Remark
8-bit timer counter 0n (TM0n)
This is an 8-bit register that counts pulses.
TM0n is read using an 8-bit memory manipulation instruction.
RESET input sets TM0n to 00H.
Remark
2
8-bit compare register 02
the timer is operation-enabled, an interrupt request match signal may be generated at the
time of the rewrite.
n = 0 to 2
n = 0 to 2
8-bit timer counter 02
(CR02)
(TM02)
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 00 TO 02
Match
Internal bus
Figure 7-3. Block Diagram of 8-Bit Timer 02
Selector
TCE02 TCL021 TCL020 TOE02
Internal bus
Clear
User’s Manual U13952EJ3V0UD
Internal bus
8-bit timer mode
control register 02 (TMC02)
F/F
Comparator
Note
P23 output
latch
PM23
INTTM02
TO2/CMPTOUT0/
P23
117
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