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Chapter 2
Pin Functions
Preliminary User’s Manual U14913EE1V0UM00
(2)
P20 to P27 (Port 2) … Input/output
Port 2 is an 8-bit input/output port in which input or output can be set in 1-bit units.
Besides functioning as an input/output port, in control mode, P20 to P27 operate as serial interface
(CSI0, CSI1, UART0) input/output.
An operation mode of port or control mode can be selected for each bit and specified by the port 2
mode control register (PMC2).
(a) Port mode
P20 to P27 can be set to input or output in 1-bit units using the port 2 mode register (PM2).
(b) Control mode
P20 to P27 can be set to port or control mode in 1-bit units using PMC2.
(c) SO0, SO1 (Serial output) … Output
These pins output CSI0 and CSI1 serial transmit data.
(d) SI0, SI1 (Serial input) … Input
These pins input CSI0 and CSI1 serial receive data.
(e) SCK0, SCK1 (Serial clock) … Input/output
These are CSI0 and CSI1 serial clock input/output pins.
(f) TXD0 (Transmit data) … Output
These pins output serial transmit data of UART0.
(g) RXD0 (Receive data) … Input
These pins input serial receive data of UART0.
Summary of Contents for V850E/CA1 ATOMIC
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