gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 40
gc80c510
Manufacturer Part Number
gc80c510
Description
Eprom/rom 8-bit Turbo Microcontrollers
Manufacturer
CORERIVER Semiconductor
Datasheet
1.GC80C510.pdf
(211 pages)
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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
Page 40 of 211
(Default)
4
-
Description
P2TYPE.2
R/W(0)
XTOFF
3
Pull-
up
P2SEL.2
2
-
P2.2
Functional Description
1
-
0
-
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