UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 266

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

(2) Operation with CR5n changed
266
Count clock
INTTM5n
Caution When reading from CR5n between <1> and <2> in Figure 8-15, the value read differs from the
Count clock
INTTM5n
TCE5n
TM5n
CR5n
TO5n
TCE5n
TM5n
CR5n
TO5n
H
N N + 1 N + 2
actual value (read value: M, actual value of CR5n: N).
t
H
N N + 1 N + 2
t
N
(a) CR5n value is changed from N to M before clock rising edge of FFH
N
(b) CR5n value is changed from N to M after clock rising edge of FFH
→ Value is transferred to CR5n at overflow immediately after change.
<1> CR5n change (N → M)
→ Value is transferred to CR5n at second overflow.
<1> CR5n change (N → M)
CHAPTER 8 8-BIT TIMER/EVENT COUNTERS 50 AND 51
Figure 8-15. Timing of Operation with CR5n Changed
FFH 00H 01H
FFH 00H 01H
<2>
02H
N
02H
User’s Manual U17260EJ6V0UD
M
N N + 1 N + 2
M M + 1 M + 2
FFH 00H 01H 02H
<2>
FFH 00H 01H 02H
M
M M + 1 M + 2
M M + 1 M + 2