UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 142

• 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

XT2/EXCLKS/
X2/EXCLK/
XT1/P123
X1/P121
Processor clock
control register
P122
P124
Clock operation mode
(PCC)
select register
(OSCCTL)
XTSTART
AMPH
Crystal/ceramic
External input
External input
High-speed system
oscillation
oscillation
clock oscillator
clock oscillator
Crystal
clock
clock
EXCLK OSCSEL
EXCLKS
Subsystem
OSCSELS
Clock operation mode
select register
(OSCCTL)
f
f
EXCLKS
f
f
XT
EXCLK
X
f
f
SUB
XH
control register
speed oscillator
(8 MHz (TYP.))
Internal high-
Main OSC
(MOC)
MSTOP
f
RH
STOP
Main clock
mode register
(MCM)
Figure 6-1. Block Diagram of Clock Generator
MCS
MOST
stabilization time counter
Internal bus
11
Internal bus
OSTS2
MOST
X1 oscillation
13
OSTS1 OSTS0
MOST
Watch timer,
clock output
14
3
Oscillation stabilization
time select register (OSTS)
MOST
15
MOST
16
Oscillation
stabilization
time counter
status register
(OSTC)
Internal oscillation
mode register
Controller
RSTS
(RCM)
LSRSTOP
Main system
clock switch
clock switch
Peripheral
hardware
RSTOP
XSEL
MCM0
Main clock
mode register
(MCM)
f
XP
1/2
Option byte
1: Cannot be stopped
0: Can be stopped
To subsystem
clock oscillator
f
SUB
2
XTSTART
CLS
f
XP
2
(240 kHz (TYP.))
speed oscillator
Internal low-
f
2
XP
CSS PCC2
Prescaler
2
f
2
XP
3
Processor clock
control register
(PCC)
4
f
2
XP
4
f
PCC1 PCC0
RL
Watchdog timer,
8-bit timer H1
Peripheral
hardware
clock (f
CPU clock
(f
CPU
)
PRS
)