Rainbow Electronics MG260 - Manual (Page 63)

MG260 Product Specification
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2.9.2.4 Keyboard
Row/Column scanning frequency = 200 Hz.
Signal Pin I/O I/O type Level Comment
ROW0 33 I/O CMOS 2.8 V/1X Internal pull-down resistor
ROW1 35 I/O CMOS 2.8 V/1X Internal pull-down resistor
ROW2 37 I/O CMOS 2.8 V/1X Internal pull-down resistor
ROW3 39 I/O CMOS 2.8 V/1X Internal pull-down resistor
COL0 43 I/O CMOS 2.8 V/1X Internal pull-up resistor
COL1 45 I/O CMOS 2.8 V/1X Internal pull-up resistor
COL2 47 I/O CMOS 2.8 V/1X Internal pull-up resistor
COL3 49 I/O CMOS 2.8 V/1X
VIL
≤ 0.3 x VCC*
VIH
≥ 0.7 x VCC*
VOL
≤ 0.1V
VOH
≥ 2.7 V
Internal pull-up resistor
*VCC = 2.8 V
2.9.2.5 Status indicators
Signal Pin I/O I/O type Level Comment
FLASH_LED 72 O CMOS
2.8 V/2X VOL
≤ 0.1V
VOH
≥ 2.7 V
GPS_TIMEPULSE 17 O CMOS
2.8 V VOL
≤ 0.1V
VOH
≥ 1.7 V