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EM78P159N Datasheet(PDF) 8 Page - ELAN Microelectronics Corp |
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EM78P159N Datasheet(HTML) 8 Page - ELAN Microelectronics Corp |
8 / 48 page EM78P159N 8-Bit Microcontrollerwith OTP ROM 4 • Product Specification (V1.0) 03.10.2006 (This specification is subject to change without further notice) 3.1 EM78P159NP and EM78P159NM Pin Description Symbol Pin No. Type Function VDD 14 - ■ Power supply P56/OSCI 16 I/O ■ General-purpose I/O pin ■ XTAL type: Crystal input terminal or external clock input pin ■ ERC type: RC oscillator input pin P55/OSCO 15 I/O ■ General-purpose I/O pin ■ XTAL type: Output terminal for crystal oscillator or external clock input pin ■ RC type: Instruction clock output ■ External clock signal input P54/TCC 3 I/O ■ General-purpose I/O pin ■ The real time clock/counter (with Schmitt trigger input pin), must be tied to VDD or VSS if not in use. /RESET 4 I ■ Input pin with Schmitt trigger. If this pin remains at logic low, the controller will also remain in reset condition. P50 ~ P53 17, 18, 1, 2 I/O ■ P50 ~ P53 are bi-directional I/O pins. ■ P50 and P51 can also be defined as the R-option pins ■ P50 ~ P53 can be pulled-down by software P60 ~ P67 6 ~ 13 I/O ■ P60 ~ P67 are bi-directional I/O pins. ■ These can be pulled-high or can be open-drain by software programming ■ P60 ~ P63 can also be pulled-down by software /INT 6 I ■ External interrupt pin triggered by falling edge VSS 5 - ■ Ground 3-2 EM78P159NAS Pin Description Symbol Pin No. Type Function VDD 15 - ■ Power supply. P56/OSCI 17 I/O ■ General-purpose I/O pin ■ XTAL type: Crystal input terminal or external clock input pin ■ ERC type: RC oscillator input pin P55/OSCO 16 I/O ■ General-purpose I/O pin ■ XTAL type: Output terminal for crystal oscillator or external clock input pin ■ RC type: Instruction clock output ■ External clock signal input P54/TCC 4 I/O ■ General-purpose I/O pin ■ The real time clock/counter (with Schmitt trigger input pin), must be tied to VDD or VSS if not in use. /RESET 5 I ■ Input pin with Schmitt trigger. If this pin remains at logic low, the controller will also remain in reset condition. P50~P53 18, 19, 2, 3 I/O ■ P50 ~ P53 are bi-directional I/O pins ■ P50 and P51 can also be defined as the R-option pins ■ P50 ~ P53 can be pulled-down by software P60~P67 7~14 I/O ■ P60 ~ P67 are bi-directional I/O pins. ■ These can be pulled-high or can be open-drain by software programming ■ P60 ~ P63 can also be pulled-down by software /INT 7 I ■ External interrupt pin triggered by falling edge VSS 6 - ■ Ground |
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