
56F8322 Techncial Data, Rev. 10.0
86 Freescale Semiconductor
Preliminary
Note: PWM is NOT available in the 56F8122 device.
As shown in Figure 6-10, the GPIO has the final control over which pin controls the I/O. SIM_GPS simply
decides which peripheral will be routed to the I/O.
Figure 6-10 Overall Control of Pads Using SIM_GPS Control
Figure 6-11 GPIO Peripheral Select Register (SIM_GPS)
6.5.8.1 Reserved—Bits 15–8
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
6.5.8.2 GPIO C6 (C6)—Bit 7
This bit selects the alternate function for GPIOC6.
• 0 = TC0 (default)
• 1 = TXD0
6.5.8.3 GPIOC5 (C5)—Bit 6
This bit selects the alternate function for GPIOC5.
• 0 = TC1 (default)
• 1 = RXD0
Base + $B 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Read
0 0 0 0 0 0 0 0
C6 C5 B1 B0 A5 A4 A3 A2
Write
RESET
0000000000 0 0 0 0 0 0
GPIOX_PER Register
GPIO Controlled
I/O
Pad Control
SIM_GPS Register
Quad Timer Controlled
SCI Controlled
0
1
0
1
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