Rainbow Electronics AT73C246 - Manual (Page 5)

5
11050A–PMAAC–07-Apr-10
AT73C246
4. Pin Description
Table 4-1. Pin Description
Pin Name I/O Pin Number Type Function
VBACKUP Output 1 Analog RTC supply
LED Output 2 Digital
Output for blinking led. Leave not
connected if a LED is not wired.
ANA0 Input 3 Analog Measurement input 0
ANA1 Input 4 Analog Measurement Input 1
ANA2 Input 5 Analog Measurement Input 2
ANA3 Input 6 Analog Measurement Input 3
VINSYS Input 7 Power PMU core supply
VDDC Output 8 Analog
PMU / Audio digital supply. Internal use
only. No resistive load.
VBG Output 9 Analog PMU Voltage reference
REXT Output 10 Analog
Resistor connection for PMU bias
current
GNDSYS GND 11 Analog PMU ground
VMID Output 12 Analog Audio Codec Mid-Supply reference
HPDET Input 13 Analog Headset detector
HPR Output 14 Analog Headset output right
HPVCM Output 15 Analog Headset virtual ground output
HPL Output 16 Analog Headset output left
AGND GND 17 Analog Audio Codec ground
AVDD Input 18 Power Audio Codec supply input
ITB Output 19 Digital
Interrupt request - Active low - Open-
drain
RSTB Output 20 Digital CPU reset - Active low - Open drain
TWD Input/Output 21 Digital Two Wire Interface - Data
TWCK Input 22 Digital Two Wire Interface - Clock
WAKEUP1 Input 23 Digital
Wake up 1 Input - VPAD level - 100k
Pull down
WAKEUP2 Input 24 Digital
Wake up 2 Input - VPAD level - 100k
Pull down
WAKEUP3 Input 25 Digital
Wake up 3 input - VPAD level - 100k
Pull down
NC - 26 - Connect to DGND
LINR Input 27 Analog Audio Line input right
LINL Input 28 Analog Audio Line input left
AUXR Input 29 Analog Audio auxiliary input right
AUXL Input 30 Analog Audio auxiliary input left