UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 523

• 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) HALT mode release
internal high-speed oscillation clock,
The HALT mode can be released by the following two sources.
(a) Release by unmasked interrupt request
When an unmasked interrupt request is generated, the HALT mode is released. If interrupt acknowledgment
is enabled, vectored interrupt servicing is carried out. If interrupt acknowledgment is disabled, the next
address instruction is executed.
Note The wait time is as follows:
Remark The broken lines indicate the case when the interrupt request which has released the standby
High-speed system clock,
• When vectored interrupt servicing is carried out:
• When vectored interrupt servicing is not carried out: 2 or 3 clocks
or subsystem clock
mode is acknowledged.
Status of CPU
release signal
Figure 21-3. HALT Mode Release by Interrupt Request Generation
Standby
Normal operation
CHAPTER 21 STANDBY FUNCTION
User’s Manual U17260EJ6V0UD
instruction
HALT
HALT mode
Interrupt
request
Oscillation
8 or 9 clocks
Wait
Note
Normal operation
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