PAC5220 Datasheet, PDF (58/73 Pages) Active-Semi, Inc – Power Application Controller

PAC5220
Power Application Controller
17. I/O CONTROLLER
17.1. Features
 5V-compliant I/O PAx, PDx, PEx
 3.3V-compliant I/O PCx
 Configurable drive strength on PAx, PDx, PEx
 Configurable pull-up or pull-down on PAx, PDx, PEx
17.2. Block Diagram
Figure 17-1. I/O controller
PAx, PDx, PEx
DIGITAL I/O
GPIO (PAx, PDx, PEx)
V (5V/3.3V)
CCIO
PULL UP
PERIPHERAL
GPIO INPUT
PULL DOWN
V (5V/3.3V)
CCIO
PERIPHERAL
GPIO OUTPUT
OUTPUT ENABLE
DRIVE STRENGTH
GPIO (PCx)
ADC MUX
GPIO INPUT
PCx
V (3.3V)
CC33
INPUT ENABLE
GPIO OUTPUT
OUTPUT ENABLE
17.3. Functional Description
The PAC can support up to 4 ports with 8 I/Os each from PAx, PCx, PDx, and PEx, in addition to the I/Os on the
analog front end.
All PAx, PCx, PDx, and PEx ports have interrupt capability with configurable interrupt edge.
17.3.1. PAx, PDx, and PEx
PAx, PDx, and PEx I/Os use VCCIO as the I/O supply voltage that is 5V on default parts (and 3.3V available from
factory). The drive current can be configured as 8mA or 16mA. They also support weak pull-up and pull-down to
save external components.
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Rev 1.0‒February 25, 2014