UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 76
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
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5.4.3
port pin.
PORT FUNCTIONS.
5.4.4
the peripheral hardware. It also divides the clock to peripheral hardware (f
CPU.
76
This circuit supplies a clock from an external IC to the X1 pin.
If external clock input is selected by the option byte as the system clock source, the X2 pin can be used as an I/O
For details of the option byte, refer to CHAPTER 17 OPTION BYTE. For details of I/O ports, refer to CHAPTER 4
The prescaler divides the clock (f
Remark The clock output by the oscillator selected by the option byte (high-speed internal oscillator,
External clock input circuit
Prescaler
crystal/ceramic oscillator, or external clock input circuit) is divided. For details of the option byte, refer to
CHAPTER 17 OPTION BYTE.
(e) Signals are fetched
V
SS
Figure 5-7. Examples of Incorrect Resonator Connection (2/2)
X1
X
) output by the system clock oscillator to generate a clock (f
X2
CHAPTER 5 CLOCK GENERATORS
User’s Manual U16898EJ5V0UD
XP
) to generate a clock to be supplied to the
XP
) to be supplied to
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