UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 519

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

it can be used as a 1-bit output port. The output pin has a dual function as the ASTB pin.
18.1 CONFIGURATION
The PD784026 has a clock function that outputs a signal scaled from the system clock.
The clock output function can output the system clock directly, or a 1/2, 1/4, 1/8 or 1/16 system clock signal. In addition,
Caution This function cannot be used with the PD784021, or when the external memory extension mode is
The clock output function configuration is shown in Figure 18-1.
f
CLK
f
f
f
CLK
CLK
CLK
f
/16
CLK
/2
/4
/8
used.
Selector 1
Output
Control
Figure 18-1 Clock Output Function Configuration
LV
CHAPTER 18 CLOCK OUTPUT FUNCTION
Address Latch Signal
0
0
CLE
0
FS2
Selector 2
FS1
FS0
RESET
Clock Output Mode
Register (CLOM)
ASTB/CLKOUT
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