upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 72

• Manufacturer Part Number: upd78f9211grt2-jjg-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: ETC-unknow

5.4.3
port pin.
PORT FUNCTIONS.
5.4.4
the peripheral hardware. It also divides the clock to peripheral hardware (f
CPU.
72
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 15 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 15 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 U16994EJ3V0UD
XP
) to generate a clock to be supplied to the
XP
) to be supplied to