AN2727 Freescale Semiconductor / Motorola, AN2727 Datasheet - Page 26

• Manufacturer Part Number: AN2727
• Description: Designing Hardware for the HCS12 D-Family
• Manufacturer: Freescale Semiconductor / Motorola

MC9S12DP256 MODRR Routing options
MC9S12DP256 MODRR Routing options
The PIM module on the D-family can re-route the I/O connectivity for a number of communications
peripherals depending on the value contained in the Module Routing Register (MODRR). This is primarily
intended to allow increased peripheral flexibility when using the 80-pin package, but can be used with the
112-pin package to optimize PCB layout.
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MODRR[1:0]
MODRR[5]
MODRR[6]
MODRR[4]
SPI
SPI
CAN
CAN
CAN
CAN
1
2
SPI
Designing Hardware for the HCS12 D-Family, Rev. 0
0
2
1
0
3
MODRR[3:2]
MISO
MOSI
SCLK
SS
MISO
MOSI
SCLK
SS
MISO
MOSI
SCLK
SS
RxCAN
TxCAN
RxCAN
TxCAN
RxCAN
TxCAN
RxCAN
TxCAN
Horizontal lines indicate default routing
CAN
4
RxCAN
TxCAN
PP0
PP1
PP2
PP3
PH0
PH1
PH2
PH3
PP4
PP5
PP7
PP6
PH4
PH5
PH6
PH7
Note the swapped
pin order here
PM4
PM5
PM2
PM3
PM0
PM1
PM6
PM7
PS4
PS5
PS6
PS7
PJ6
PJ7
Freescale Semiconductor