UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 530

• 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

530
(b) Release by reset signal generation
When the reset signal is generated, STOP mode is released, and then, as in the case with a normal reset
operation, the program is executed after branching to the reset vector address.
Remark f
Internal high-speed
(X1 oscillation)
Status of CPU
oscillation clock
system clock
Reset signal
Status of CPU
High-speed
Reset signal
×: don’t care
Maskable interrupt
request
Reset
X
Table 21-4. Operation in Response to Interrupt Request in STOP Mode
: X1 clock oscillation frequency
(2) When internal high-speed oscillation clock is used as CPU clock
Release Source
(1) When high-speed system clock is used as CPU clock
Normal operation
(internal high-speed
system clock)
Oscillates
Normal operation
(high-speed
oscillation clock)
Oscillates
Figure 21-7. STOP Mode Release by Reset
instruction
CHAPTER 21 STANDBY FUNCTION
STOP
instruction
STOP
MK××
User’s Manual U17260EJ6V0UD
Oscillation stopped
0
0
0
0
0
1
−
Oscillation stopped
STOP mode
STOP mode
PR××
0
0
1
1
1
×
−
IE
Oscillation
0
1
0
×
1
×
×
Starting X1 oscillation is
stopped
period
Reset
specified by software.
Oscillation
stopped
period
Reset
accuracy stabilization
Wait for oscillation
ISP
(11 to 45 s)
Oscillation
processing
×
×
1
0
1
×
×
(86 to 361 s)
stopped
Reset
(11 to 45 s)
processing
Reset
µ
µ
Next address
instruction execution
Interrupt servicing
execution
Next address
instruction execution
Interrupt servicing
execution
STOP mode held
Reset processing
Oscillation stabilization time
(internal high-speed
µ
Normal operation
oscillation clock)
(internal high-speed
Operation
Normal operation
Oscillates
oscillation clock)
(2
Oscillates
11
/f
X
to 2
16
/f
X
)