AN2313 Freescale Semiconductor / Motorola, AN2313 Datasheet - Page 11

• Manufacturer Part Number: AN2313
• Description: Connecting an MSC8102 TDM to an MSC8101 Device
• Manufacturer: Freescale Semiconductor / Motorola

3.9 Parallel I/O Pins
3.10 TDMA
The CPM interface is essentially a set of I/O pins that can be configured for either a peripheral or
general-purpose function. The multiplexed peripheral pins for TDMA are configured through the parallel
I/O port registers, PPAR, PSOR, and PDIR (see Table 15).
To enable the TDM, the serial interface registers must be configured. The SI Global Mode Register
(SI1GMR) is the last register to be set up in the driver before the driver is started. Because TDMA is
used, this register is set to a value of 0x01.
Register
PSORA
PSORB
PPARC
PSORC
PPARD
PSORD
PPARA
PPARB
PDIRA
PDIRB
PDIRC
PDIRD
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Register Value
0x03C00000
0x03C00000
0x00000000
0x00000101
0x00000000
0x00000001
Table 15. General I/O pins registers
0x0
0x0
0x0
0x0
0x0
0x0
PA9, PA8, PA7, and PA6 are dedicated pins.
PA9, PA8, PA7, and PA6 are dedicated option 2 pins.
PA9 direction is output.
PC31, BRG1O, and PC23 (CLK9)
are dedicated pins.
All the ports are dedicated option 1.
PC31 direction is output (BRG10 port).
Configuring the MSC8101 MCCs
Description
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