UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 68
UPD78F9222MC(T)-5A4-A
Manufacturer Part Number
UPD78F9222MC(T)-5A4-A
Description
8BIT MCU, 4K FLASH, 256B RAM, 78F9222
Manufacturer
NEC
Datasheet
1.UPD78F9222MCT-5A4-A.pdf
(414 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPD78F9222MC(T)-5A4-A
Manufacturer:
NEC
Quantity:
1 000
Company:
Part Number:
UPD78F9222MC(T)-5A4-A
Manufacturer:
NEC/PBF
Quantity:
6 640
Part Number:
UPD78F9222MC(T)-5A4-A
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
- Current page: 68 of 414
- Download datasheet (4Mb)
5.1
peripheral hardware, and a circuit that generates a clock (interval time generation clock) to be supplied to the
watchdog timer and 8-bit timer H1 (TMH1).
5.1.1
5.1.2
68
The clock generators include a circuit that generates a clock (system clock) to be supplied to the CPU and
The following three types of system clock oscillators are used.
• High-speed internal oscillator
• Crystal/ceramic oscillator
• External clock input circuit
The system clock source is selected by using the option byte. For details, refer to CHAPTER 17 OPTION BYTE.
When using the X1 and X2 pins as I/O port pins, refer to CHAPTER 4 PORT FUNCTIONS for details.
The following circuit is used as a clock oscillator for interval time generation.
• Low-speed internal oscillator
This circuit internally oscillates a clock of 8 MHz (TYP.). Its oscillation can be stopped by execution of the STOP
instruction.
If the high-speed internal oscillator is selected to supply the system clock, the X1 and X2 pins can be used as I/O
port pins.
This circuit oscillates a clock with a crystal/ceramic oscillator connected across the X1 and X2 pins. It can
oscillate a clock of 2 to 10 MHz. Oscillation of this circuit can be stopped by execution of the STOP instruction.
This circuit supplies a clock from an external IC to the X1 pin. A clock of 2 to 10 MHz can be supplied. Internal
clock supply can be stopped by execution of the STOP instruction.
If the external clock input is selected as the system clock, the X2 pin can be used as an I/O port pin.
This circuit oscillates a clock of 240 kHz (TYP.). Its oscillation can be stopped by using the low-speed internal
oscillation mode register (LSRCM) when it is specified by the option byte that its oscillation can be stopped by
software.
Functions of Clock Generators
System clock oscillators
Clock oscillator for interval time generation
CHAPTER 5 CLOCK GENERATORS
User’s Manual U16898EJ5V0UD
Related parts for UPD78F9222MC(T)-5A4-A
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
16/8 bit single-chip microcomputer
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
Dual audio power amp circuit
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
Dual comparator
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
MOS type composite field effect transistor
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
50 V/100 mA FET array incorporating 2 N-ch MOSFETs
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
6-pin small MM high-frequency double transistor
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
6-pin small MM high-frequency double transistor
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
6-pin small MM high-frequency double transistor
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
6-pin small MM high-frequency double transistor
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
Twin transistors equipped with different model chips(6P small MM)
Manufacturer:
NEC
Datasheet:
Part Number:
Description:
Bipolar analog integrated circuit
Manufacturer:
NEC
Datasheet: