MEDIATEK Ralink MT7620 - Programmable I;O

PGMT7620_V.1.0_040503
Page 81 of 523
MT7620 PROGRAMMING GUIDE
Integrated 802.11n MAC/BBP and 2.4 GHz RF/FEM Router-on-a-Chip
2.8 Programmable I/O
2.8.1 Features
 Supports 73 programmable I/Os
 Parameterized numbers of independent inputs, outputs, and inputs
 Independent polarity controls for each pin
 Independently masked edge detect interrupt on any input transition
 Programmable I/O pins are shared with MDIO, JTAG, UART-Lite, UART, SPI, PCM, I2C, GE1, and
EPHY_LED.
2.8.2 Block Diagram
Edge Detect
PalmBus Interface
Q
Q
Polarity Data Out
Direction
Reset
from Power
Management
Clock
from Power
Management
Interrupt
to Interrupt
Controller
PalmBus Signals
to PalmBus
Controller
PIO Data
to I/O Cells
Q
PIO Controller
Figure 2-6 Programmable I/O Block Diagram