
M451
May. 4, 2018
Page
154
of
1006
Rev.2.08
M4
51
S
E
RI
E
S
T
E
CH
NICA
L RE
F
E
R
E
NC
E
M
A
NU
A
L
Pin No.
Pin Name
Type
MFP*
Description
EBI_AD2
I/O
MFP7
EBI address/data bus bit 2.
81
PA.1
I/O
MFP0
General purpose digital I/O pin.
UART1_nRTS
O
MFP1
Request to Send output pin for UART1.
UART1_RXD
I
MFP3
Data receiver input pin for UART1.
CAN0_TXD
I
MFP4
CAN bus transmitter input.
SC0_DAT
I/O
MFP5
SmartCard data pin.
PWM1_CH4
I/O
MFP6
PWM1 output/capture input.
EBI_AD1
I/O
MFP7
EBI address/data bus bit 1.
STADC
I/O
MFP10
ADC external trigger input. (M45xD/M45xC Only)
82
PA.0
I/O
MFP0
General purpose digital I/O pin.
UART1_nCTS
I
MFP1
Clear to Send input pin for UART1.
UART1_TXD
O
MFP3
Data transmitter output pin for UART1.
CAN0_RXD
I
MFP4
CAN bus receiver input.
SC0_CLK
O
MFP5
SmartCard clock pin.
PWM1_CH5
I/O
MFP6
PWM1 output/capture input.
EBI_AD0
I/O
MFP7
EBI address/data bus bit 0.
INT0
I
MFP8
External interrupt0 input pin.
SPI1_I2SMCLK
O
MFP9
I2S1 master clock output pin. (M45xD/M45xC Only)
83
PA.12
I/O
MFP0
General purpose digital I/O pin.
SPI1_I2SMCLK
O
MFP2
I2S1 master clock output pin.
CAN0_TXD
I
MFP4
CAN bus transmitter input.
84
PA.13
I/O
MFP0
General purpose digital I/O pin.
CAN0_RXD
I
MFP4
CAN bus receiver input.
85
PA.14
I/O
MFP0
General purpose digital I/O pin.
UART2_nCTS
I
MFP3
Clear to Send input pin for UART2.
I2C0_SMBAL
O
MFP4
I2C0 SMBus SMBALTER# pin
86
PA.15
I/O
MFP0
General purpose digital I/O pin.
UART2_nRTS
O
MFP3
Request to Send output pin for UART2.
I2C0_SMBSUS
O
MFP4
I2C0 SMBus SMBSUS# pin (PMBus CONTROL pin)
87
V
SS
A
MFP0
Ground pin for digital circuit.
88
V
DD
A
MFP0
Power supply for I/O ports and LDO source for internal
PLL and digital function.
89
AV
DD
A
MFP0
Power supply for internal analog circuit.
90
V
REF
I
MFP0
Voltage reference input for ADC.
Note:
This pin needs to be connected with a 1uF
capacitor.