gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 40

• Manufacturer Part Number: gc80c510
• Description: Eprom/rom 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

6.2.1.2.6 PMR (C4h) : Power Management Register
Figure 6-5 Configuration of PORT2
Symbol
Bit No.
XTOFF
Internal Amplifier Disable for External Crystal Oscillator.
This bit controls the enable/disable the internal amplifier for external crystal oscillator.
0 = Internal amplifier is enabled.
1 = Internal amplifier is disabled.
Set the XTOFF bit to “1” when user wants to use P1[0] and P1[2] as general I/O pins.
Don’t set XTOFF bit to “1” when XT/RG bit (EXIF.3) is “1”.
(XT/RG = “1” : The external clock is selected as system clock. Refer to EXIF register.)
7
-
CPU BUS
Alternative Output
Alternative Enable
ADC11 Input
6
-
Digital Input
P2.2
SFR
QB
Q
P2DIR.2
0
1
5
-
ADC11B
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(Default)
4
-
Description
P2TYPE.2
R/W(0)
XTOFF
3
Pull-
up
P2SEL.2
2
-
P2.2
Functional Description
1
-
0
-