UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 127

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

XT2/EXCLKS/
X2/EXCLK/
XT1/P123
X1/P121
P122
P124
Clock operation mode
Clock operation mode
select register
(OSCCTL)
select register
AMPH
(OSCCTL)
Crystal/ceramic
External input
External input
High-speed system
oscillation
oscillation
EXCLKS
clock oscillator
clock oscillator
Crystal
clock
clock
EXCLK OSCSEL
Subsystem
OSCSELS
f
f
f
f
EXCLKS
XT
X
EXCLK
f
f
SUB
XH
(8 MHz (TYP.))
control register
high-speed
oscillator
Internal
Main OSC
(MOC)
f
MSTOP
RH
Main clock
mode register
(MCM)
STOP
Figure 6-1. Block Diagram of Clock Generator
MCS
stabilization time counter
MOST
Internal bus
Internal bus
11
OSTS2
MOST
X1 oscillation
13
OSTS1 OSTS0
MOST
Watch timer
14
3
Oscillation stabilization
time select register (OSTS)
MOST
15
MOST
16
Oscillation
stabilization
time counter
status register
(OSTC)
Internal oscillator
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
f
SUB
2
CLS
CSS PCC2
f
XP
2
(240 kHz (TYP.))
f
2
XP
low-speed
Prescaler
oscillator
2
Internal
4
f
Processor clock
control register
(PCC)
2
XP
3
PCC1 PCC0
f
2
XP
4
f
RL
Watchdog timer,
8-bit timer H1
Peripheral
hardware
clock (f
CPU clock
(f
CPU
)
PRS
)