Block Diagram - Intel PXA27 Series Design Manual

18.3

Block Diagram

See Figure 18-1
PXA27x processor keypad controller. This specific configuration shows the keypad controller
interfaced to the maximum size matrix keypad of 64 keys and 6 direct keys with a single rotary
encoder.
Figure 18-1. Keypad Interface Block Diagram
Interrupt
Generator
Direct
Interface
Keypad
Interface
Registers
Matrix
Interface
Keypad Interface Controller
®
Intel PXA27x Processor Family Design Guide
for illustration of one of many possible configurations when interfacing to the
KP_DKIN<0>
KP_DKIN<1>
KP_DKIN<2>
KP_DKIN<3>
KP_DKIN<4>
KP_DKIN<5>
KP_DKIN<6>
KP_DKIN<7>
KP_MKOUT<7>
KP_MKOUT<6>
KP_MKOUT<5>
KP_MKOUT<4>
KP_MKOUT<3>
KP_MKOUT<2>
KP_MKOUT<1>
KP_MKOUT<0>
KP_MKIN<0>
KP_MKIN<1>
KP_MKIN<2>
KP_MKIN<3>
KP_MKIN<4>
KP_MKIN<5>
KP_MKIN<6>
KP_MKIN<7>
PWR
A
Com
B
Matrix Keypad
Keypad Interface
KEYPAD_001_P2
II:18-3