Datasheet

56F8037/56F8027 Signal Pins
56F8037/56F8027 Data Sheet, Rev. 8
Freescale Semiconductor 33
GPIOB6
(RXD0)
(SDA
21
)
(CLKIN)
1 Input/
Output
Input
Input/
Output
Input
Input,
internal
pull-up
enabled
Port B GPIO — This GPIO pin can be individually programmed as
an input or output pin.
Receive Data 0 — QSCI0 receive data input.
Serial Data — This pin serves as the I
2
C serial data line.
External Clock Input — This pin serves as an optional external
clock input.
After reset, the default state is GPIOB6. The peripheral functionality
is controlled via the SIM (See Section 6.3.16) and the CLKMODE bit
of the OCCS Oscillator Control Register.
21
The SDA signal is also brought out on the GPIOB1 and GPIOB9 pins.
GPIOB7
(TXD0)
(SCL
22
)
3 Input/
Output
Input/
Output
Input/
Output
Input,
internal
pull-up
enabled
Port B GPIO — This GPIO pin can be individually programmed as
an input or output pin.
Transmit Data 0 — QSCI0 transmit data output or transmit / receive
in single wire operation.
Serial Clock — This pin serves as the I
2
C serial clock.
After reset, the default state is GPIOB7. The peripheral functionality
is controlled via the SIM. See Section 6.3.16.
22
The SCL signal is also brought out on the GPIOB0 and GPIOB8 pins.
GPIOB8
(SCL
23
)
(CANTX
24
)
54 Input/
Output
Input/
Output
Open Drain
Output
Input,
internal
pull-up
enabled
Port B GPIO — This GPIO pin can be individually programmed as
an input or output pin.
Serial Clock 1 — This pin serves as the I
2
C serial clock.
CAN Transmit Data — This is the SCAN interface output.
After reset, the default state is GPIOB8. The peripheral functionality
is controlled via the SIM. See Section 6.3.16.
23
The SCL signal is also brought out on the GPIOB0 and GPIOB7 pins.
24
The CANTX signal is also brought out on the GPIOB12 pin.
Return to Table 2-2
Table 2-3 56F8037/56F8027 Signal and Package Information for the 64-Pin LQFP (Continued)
Signal
Name
LQFP
Pin No.
Type
State During
Reset
Signal Description