datasheetbank_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

EM78P156EL View Datasheet(PDF) - Elan Microelectronics Corp

Part Name
Description
View to exact match
EM78P156EL
ELAN
Elan Microelectronics Corp ELAN
EM78P156EL Datasheet PDF : 55 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
EM78P156EL
OTP ROM
3. IOC5 ~ IOC6 (I/O Port Control Register)
• "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 can be defined.
• IOC5 and IOC6 registers are both readable and writable.
4. IOCA (Prescaler Counter Register)
• IOCA register is readable.
• The value of IOCA is equal to the contents of Prescaler counter.
• Down counter.
5. IOCB (Pull-down Control Register)
7
6
5
4
3
2
/PD7
/PD6
/PD5
/PD4
-
/PD2
Bit 0 (/PD0) Control bit is used to enable the pull-down of P50 pin.
0: Enable internal pull-down
1: Disable internal pull-down
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 Not used.
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 (/PD7) Control bit is used to enable the pull-down of P63 pin.
• IOCB Register is both readable and writable.
1
/PD1
0
/PD0
6. IOCC (Open-drain Control Register)
7
OD7
6
OD6
5
OD5
4
OD4
3
OD3
2
OD2
Bit 0 (OD0) Control bit is used to enable the open-drain of P60 pin.
0: Disable open-drain output
1: Enable open-drain output
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 (OD3) Control bit is used to enable the open-drain of P63 pin.
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.
This specification is subject to change without prior notice.
13
1
OD1
0
OD0
07.29.2004 (V1.3)
 

Share Link: 

datasheetbank.com [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]