UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 81

• 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

Note Operation stop time is 277
(a) The internal reset signal is generated by the power-on-clear function on power application, the option byte is
(b) The option byte is referenced and the system clock is selected. Then the external clock operates as the
Remark PCC:
referenced after reset, and the system clock is selected.
system clock.
System clock
Internal reset
CPU clock
PPCC: Preprocessor clock control register
RESET
V
DD
Figure 5-13. Status Transition of Default Start by External Clock Input
Processor clock control register
H
Figure 5-12. Timing of Default Start by External Clock Input
Interrupt
(a)
HALT
µ
System clock is selected.
s (MIN.), 544
CHAPTER 5 CLOCK GENERATORS
(Operation stops
selected by option byte
Option byte is read.
External clock input
Clock division ratio
instruction
variable during
power-on-clear
CPU operation
HALT
User’s Manual U16898EJ5V0UD
Reset by
application
Power
µ
V
Start with PCC = 02H,
PPCC = 02H
Note
instruction
s (TYP.), and 1.075 ms (MAX.).
DD
STOP
)
> 2.1 V (TYP.)
(b)
STOP
Interrupt
PCC = 02H, PPCC = 02H
Reset signal
External clock input
81