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EM78P468NCQS Datasheet(PDF) 11 Page - ELAN Microelectronics Corp |
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EM78P468NCQS Datasheet(HTML) 11 Page - ELAN Microelectronics Corp |
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11 / 82 page  EM78P468N/EM78P468L 8-Bit Microcontroller Product Specification (V1.5) 02.15.2007 • 5 (This specification is subject to change without further notice) Table 2 (b) Pin Description for Package of QFP44 and LQFP44 Symbol Pin No. Type Function P5.4/INT0 21 I/O 1-bit General purpose input/output pin/external interrupt. The INT0 interrupt source can be set to falling or rising edge by IOC71 register Bit 7 (INT_EDGE). Wakes up from sleep mode and idle mode when the pin status changes. P5.5/INT1 22 I/O 1-bit General purpose input/output pin/external interrupt. The Interrupt source is a falling edge signal. Wakes up from sleep mode and idle mode when the pin status changes. P5.6/TCC 23 I/O 1-bit General purpose input/output pin/external counter input. This pin works in normal/green/idle mode. P5.7/IROUT 24 I/O 1-bit General purpose input/output pin/IR/PWM mode output pin This pin is capable of sinking 20mA/5V. P6.0~P6.7 25~32 I/O 8-bit General purpose input/output pins Pull-high, pull-low and open drain function supported. All pins can wake up from sleep and idle modes when the pin status changes. COM3~0 6~9 O LCD common output pin. SEG11~SEG14 5~2 O LCD segment output pin. SEG16/P7.0 SEG17/P7.1 ~ SEG23/P7.7 1 44 ~ 38 O/(I/O) LCD segment output pin. Can be shared with general purpose I/O pin SEG24/P8.0 ~ SEG31/P8.4 37 ~ 33 O/(I/O) LCD segment output pin. Can be shared with general I/O pin For general purpose I/O use, can wake up from sleep mode and idle mode when the pin status changes. For general purposes I/O use, supports pull-high function. VB 10 O Connect capacitors for LCD bias voltage. VA 11 O Connect capacitors for LCD bias voltage. VLCD2 12 O One of LCD bias voltage. VLCD3 13 O One of LCD bias voltage. /RESET 14 I General-purpose Input only Low active. If it remains at logic low, the device will be reset. R-OSCI 16 I In Crystal mode: crystal input In RC mode: resistor pull high. In PLL mode: connect 0.01 µF capacitance to GND Connect 0.01 µF capacitor to GND and code option select PLL mode when high oscillator is not use OSCO 17 O In Crystal mode: crystal input In RC mode: instruction clock output Xin 19 I In Crystal mode: Input pin for sub-oscillator. Connect to a 32.768kHz crystal. Xout 20 o In Crystal mode: Connect to a 32.768kHz crystal. In RC mode: instruction clock output VDD 18 I Power supply GND 15 I System ground pin |
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