NEC PD78053 Manuale Utente
![NEC](https://files.manualsbrain.com/attachments/44abc27a7ab3d3ebaea5604c1237604964b3b528/common/fit/150/50/0a4ba346278cf7fed7416c8056bd03af105e868674aa2dfa47e23e007d42/brand_logo.png)
238
CHAPTER 9 8-BIT TIMER/EVENT COUNTERS 1 AND 2
Figure 9-13. Square-Wave Output Operation Timing
Note
The initial value of TO2 pin output can be set with the bits 6 and 7 (LVR2, LVS2) of 8-bit timer output control
register (TOC1).
9.5 Cautions on 8-Bit Timer/Event Counters 1 and 2
(1) Timer start errors
An error with a maximum of one clock may occur concerning the time required for a match signal to be
generated after timer start. This is because 8-bit timer registers 1 and 2 (TM1 and TM2) starts asynchronously
with the count pulse.
Figure 9-14. 8-Bit Timer Registers 1 and 2 Start Timing
Count Clock
TM1, TM2 Count Value
CR10, CR20
INTTM2
TO2 Pin Output
Note
0000
0001
0002
N-1
N
0000
0001
0002
N-1
N
0000
N
Count Pulse
TM1, TM2 Count Value
00H
01H
02H
03H
04H
Timer Start