em78p156n ELAN Microelectronics Corp, em78p156n Datasheet - Page 14

• Manufacturer Part Number: em78p156n
• Description: 8-bit Micro-controller
• Manufacturer: ELAN Microelectronics Corp

This specification is subject to change without prior notice.
7. IOCD (Pull-high Control Register)
8. IOCE (WDT Control Register)
WDTE
• Bit 5 (OD5) Control bit is used to enable the open-drain of P65 pin.
• 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.
• Bit 0 (/PH0) Control bit is used to enable the pull-high of P60 pin.
• 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.
• Bit 7 (WDTE) Control bit used to enable Watchdog timer.
• Bit 6 (EIS) Control bit is used to define the function of P60 (/INT) pin.
"1".
read by way of reading Port 6 (R6). Refer to Fig. 7(a).
• Bit 4 (ROC) ROC is used for the R-option.
/PH7
0: Enable internal pull-high
1: Disable internal pull-high
0: Disable WDT.
1: Enable WDT.
WDTE is both readable and writable.
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
When EIS is "0", the path of /INT is masked. When EIS is "1", the status of /INT pin can also be
EIS is both readable and writable.
7
7
/PH6
EIS
6
6
/PH5
5
5
-
/PH4
ROC
14
4
4
/PH3
3
3
-
/PH2
2
2
-
/PH1
1
1
-
EM78P156N
OTP ROM
07.29.2004 (V1.2)
/PH0
0
0
-