CHAPTER 12 PORT FUNCTIONS
User’s Manual U12688EJ4V0UM00
349
(1) Function of each port
The port functions of this product are shown below.
8/1-bit operations are possible on all ports, allowing various kinds of control to be performed. In addition to
their port functions, these pins also function as internal peripheral I/O input/output pins in the control mode.
Port Name
Pin Name
Port Function
Function in Control Mode
Block Type
Note
Port 0
P00 to P07
8-bit I/O
Input/output of real-time pulse unit (RPU)
External interrupt input
DMA control (DMAC) input
A, B, M
Port 1
P10 to P17
8-bit I/O
Input/output of real-time pulse unit (RPU)
External interrupt input
DMA control (DMAC) output
A, B, K
Port 2
P20 to P27
1-bit input,
7-bit I/O
NMI input
Serial interface (UART0/CSI0, UART1/CSI1)
input/output
C, D, I, J, Q
Port 3
P30 to P37
8-bit I/O
Input/output of real-time pulse unit (RPU)
External interrupt input
Serial interface (CSI2) input/output
A, B, K, M, N
Port 4
P40 to P47
8-bit I/O
External data bus (D0 to D7)
E
Port 5
P50 to P57
8-bit I/O
External data bus (D8 to D15)
E
Port 6
P60 to P67
8-bit I/O
External address bus (A16 to A23)
F
Port 7
P70 to P77
8-bit input
A/D converter (ADC) analog input
G
Port 8
P80 to P87
8-bit I/O
External bus interface control signal output
O, P
Port 9
P90 to P97
8-bit I/O
External bus interface control signal input/output
H, O
Port 10
P100 to P107
8-bit I/O
Input/output of real-time pulse unit (RPU)
External interrupt input
DMA control (DMAC) output
A, B, K
Port 11
P110 to P117
8-bit I/O
Input/output of real-time pulse unit (RPU)
External interrupt input
Serial interface (CSI3) input/output
A, B, K, M, N
Port 12
P120 to P127
8-bit I/O
Input/output of real-time pulse unit (RPU)
External interrupt input
A/D converter (ADC) external trigger input
A, B
Port A
PA0 to PA7
8-bit I/O
External address bus (A0 to A7)
F
Port B
PB0 to PB7
8-bit I/O
External address bus (A8 to A15)
F
Port X
PX5 to PX7
3-bit I/O
Refresh request signal output
Wait insertion signal input
Internal system clock output
A, L
Note Refer to 12.2 (3) Block diagram of port.
Caution When switching to the control mode, be sure to set ports that operate as output pins, or as
input/output pins in the control mode, by the following procedure.
<1> Set the inactive level for the signal output in the control mode in the relevant bits of port n
(Pn) (n = 0 to 6, 8 to 12, A, B, X).
<2> Switch to the control mode from the port n mode control register (PMCn).
If <1> above is not performed, when switching from the port mode to the control mode, the
contents of port n (Pn) will be output instantaneously.
Содержание V850E/MS1 UPD703100
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