em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 21

• Manufacturer Part Number: em78p134n
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.6) 06.02.2010
(This specification is subject to change without further notice)
5.2.10 IOCC (Open-drain Control Register)
5.2.11 IOCD (Pull-high Control Register)
Bit 7 (OD67): Control bit used to enable open-drain of the P67 pin.
Bit 6 (OD66): Control bit used to enable open-drain of the P66 pin.
Bit 5 (OD65): Control bit used to enable open-drain of the P65 pin.
Bit 4 (OD64): Control bit used to enable open-drain of the P64 pin.
Bit 3 (unused): Unused bit, set to 0 all the time.
Bit 2 (OD62): Control bit used to enable open-drain of the P62 pin.
Bit 1 (OD61): Control bit used to enable open-drain of the P61 pin.
Bit 0 (OD60): Control bit used to enable open-drain of the P60 pin.
The IOCC Register is both readable and writable.
Bit 7 (/PH67): Control bit used to enable pull-high of the P67 pin.
Bit 6 (/PH66): Control bit used to enable pull-high of the P66 pin.
Bit 5 (/PH65): Control bit used to enable pull-high of the P65 pin.
Bit 4 (/PH64): Control bit used to enable pull-high of the P64 pin.
Bit 3 (unused): Unused bit, set to 0 all the time.
Bit 2 (/PH62): Control bit used to enable pull-high of the P62 pin.
Bit 1 (/PH61): Control bit used to enable pull-high of the P61 pin.
Bit 0 (/PH60): Control bit used to enable pull-high of the P60 pin.
The IOCD Register is both readable and writable.
/PH67
OD67
Bit 7
Bit 7
/PH66
OD66
Bit 6
Bit 6
0: Disable open-drain output
1: Enable open-drain output
0: Enable internal pull-high
1: Disable internal pull-high
/PH65
OD65
Bit 5
Bit 5
/PH64
OD64
Bit 4
Bit 4
Bit 3
Bit 3
8-Bit Microcontroller with OTP ROM
0
0
/PH62
OD62
Bit 2
Bit 2
/PH61
OD61
Bit 1
Bit 1
EM78P134N
/PH60
OD60
Bit 0
Bit 0
• 15