PPC7A Product Manual
Functional Description
8-26
1
st
Edition
COMs Register (Port 0x0824)
This register provides control for COMs 3 & 4, for the Clocks and interface configuration.
MSB = D0, LSB = D7
D0:
COM3_CLK_EN, this bit enables the TSCLK3 signal out on to COM3_TT (transmit clock)
0 = Disabled
1 = Enabled
D1:
TSCLK3_EN, when enabled COM3_RT (receive transmit clock) is linked to TSCLK3 is
0 = Disabled
1 = Enabled
D2:
COM3_RS232, selects which interface is used for COM3
0 = RS232
1 = RS422
D3:
COM3_TX_EN, when enabled allows all of the COM3 interface buffers.
0 = Disabled
1 = Enabled
D4:
COM4_CLK_EN, this bit enables the TSCLK4 signal out on to COM4_TT (transmit clock)
0 = Disabled
1 = Enabled
D5:
TSCLK4_EN, when enabled COM4_RT (receive transmit clock) is linked to TSCLK4 is
0 = Disabled
1 = Enabled
D6:
COM4_RS232, selects which interface is used for COM4
0 = RS232
1 = RS422
D7:
COM4_TX_EN, when enabled allows all of the COM4 interface buffers.
0 = Disabled
1 = Enabled
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