EM78P153EN EMC [ELAN Microelectronics Corp], EM78P153EN Datasheet - Page 11

• Manufacturer Part Number: EM78P153EN
• Description: EM78P153E is an 8-bit microprocessor with low-power and high-speed CMOS technology
• Manufacturer: EMC [ELAN Microelectronics Corp]

This specification is subject to change without prior notice.
3. IOC5 ~ IOC6 (I/O Port Control Register)
4. IOCB (Pull-down Control Register)
5. IOCC (Open-drain Control Register)
• Bit 7 Not used.
• CONT register is both readable and writable.
• "1" put the relative I/O pin into high impedance, while "0" defines the relative I/O pin as output.
• Only the lower 4 bits of IOC5 are available to be defined.
• IOC5 and IOC6 registers are both readable and writable.
• Bit 0 (/PD0) Control bit is used to enable the pull-down of P50 pin.
• Bit 1 (/PD1) Control bit is used to enable the pull-down of P51 pin.
• Bit 2 (/PD2) Control bit is used to enable the pull-down of P52 pin.
• Bit 3
• Bit 4 (/PD4) Control bit is used to enable the pull-down of P60 pin.
• Bit 5 (/PD5) Control bit is used to enable the pull-down of P61 pin.
• Bit 6 (/PD6) Control bit is used to enable the pull-down of P62 pin.
• Bit 7
• IOCB Register is both readable and writable.
• Bit 0 (OD0) Control bit is used to enable the open-drain of P60 pin.
• Bit 1 (OD1) Control bit is used to enable the open-drain of P61 pin.
• Bit 2 (OD2) Control bit is used to enable the open-drain of P62 pin.
• Bit 3
• Bit 4 (OD4) Control bit is used to enable the open-drain of P64 pin.
• 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.
0: Enable internal pull-down
1: Disable internal pull-down
0: Disable open-drain output
1: Enable open-drain output
1: enabled by ENI/RETI instructions
OD7
7
7
-
Not used.
Not used.
Not used.
/PD6
OD6
6
6
/PD5
OD5
5
5
/PD4
OD4
4
4
11
3
3
-
-
/PD2
OD2
2
2
EM78P153E
/PD1
OD1
1
1
OTP ROM
/PD0
2002/03/01
OD0
0
0