EM78156E
8-Bit Microcontroller with MASK ROM
Bit 6 (OD6) Control bit is used to enable the open-drain of P66 pin.
Bit 7 (OD7) Control bit is used to enable the open-drain of P67 pin.
IOCC Register is both readable and writable.
4.2.7 IOCD (Pull-high Control Register)
7
6
5
4
3
2
1
0
/PH7
/PH6
/PH5
/PH4
/PH3
/PH2
/PH1
/PH0
Bit 0 (/PH0) Control bit is used to enable the pull-high of P60 pin.
0: Enable internal pull-high
1: Disable internal pull-high
Bit 1 (/PH1) Control bit is used to enable the pull-high of P61 pin.
Bit 2 (/PH2) Control bit is used to enable the pull-high of P62 pin.
Bit 3 (/PH3) Control bit is used to enable the pull-high of P63 pin.
Bit 4 (/PH4) Control bit is used to enable the pull-high of P64 pin.
Bit 5 (/PH5) Control bit is used to enable the pull-high of P65 pin.
Bit 6 (/PH6) Control bit is used to enable the pull-high of P66 pin.
Bit 7 (/PH7) Control bit is used to enable the pull-high of P67 pin.
IOCD Register is both readable and writable.
4.2.8 IOCE (WDT Control Register)
7
6
5
4
3
2
1
0
WDTE
EIS
-
ROC
-
-
-
-
Bit 7 (WDTE) Control bit used to enable Watchdog timer.
0: Disable WDT.
1: Enable WDT.
WDTE is both readable and writable.
Bit 6 (EIS)
Control bit is used to define the function of P60(/INT) pin.
0: P60, bi-directional I/O pin.
1: /INT, external interrupt pin. In this case, the I/O control bit of P60 (bit
0 of IOC6) must be set to "1".
When EIS is "0", the path of /INT is masked. When EIS is "1", the status
of /INT pin can also be read by way of reading Port 6 (R6). Refer to Fig.
7(a).
EIS is both readable and writable.
10 •
Product Specification (V1.3) 07.29.2004
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
