UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 70

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

70
X1/P121
X2/P122
Note Select the high-speed internal oscillator, crystal/ceramic oscillator, or external clock input
system clock source by using the option byte.
System clock
Crystal/ceramic
oscillator
External clock
High-speed
oscillation
oscillation
internal
STOP
input
System clock oscillation
stabilization time counter
Note
OSTS1 OSTS0
f
X
Oscillation stabilization
time select register (OSTS)
Low-speed internal oscillation
mode register (LSRCM)
Watchdog timer
Option byte
1: Cannot be stopped.
0: Can be stopped.
Figure 5-1. Block Diagram of Clock Generators
f
2
X
Internal bus
Prescaler
CHAPTER 5 CLOCK GENERATORS
2
f
X
2
User’s Manual U16898EJ5V0UD
PPCC1 PPCC0
Internal bus
Low-speed
oscillator
internal
LSRSTOP
Preprocessor clock
control register (PPCC)
f
XP
f
RL
Prescaler
f
2
XP
2
Clock to peripheral
hardware (f
PCC1
8-bit timer H1,
watchdog timer
Processor clock
control register (PCC)
XP
)
Controller
C
P
U
circuit
CPU clock
(f
CPU
as the
)