STR720 datasheet(16/401 Pages) STMICROELECTRONICS

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STR720 - PIN DATA

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4.5 Port 2 pins

Port 2 consists of 16 bidirectional general purpose I/O pins. They are under ARM720 control

through a configuration register, a data register and a direction register. These registers are

read/write registers. Port lines can be individually configured as general purpose inputs,

general purpose outputs or dedicated peripheral lines. The port can be read at any time: input

lines return the pin level; output lines return the level of the output driver input. When written,

the port stores the data in an internal register: it drives the pins only if they are configured as

general purpose outputs. Port 2 outputs can be configured as push/pull or open drain drivers.

Table 6. Port 2 Pins

Symbol

I/O

Function

P2.0

122

I/O

Port 2 General Purpose Input/Output data line 0.

UART1. Receive Data Input (RxD1).

P2.1

123

I/O

Port 2 General Purpose Input/Output data line 1.

UART1. Transmit Data Output (TxD1).

P2.2

124

I/O

Port 2 General Purpose Input/Output data line 2.

UART2. Receive Data Input (RxD2).

P2.3

125

I/O

Port 2 General Purpose Input/Output data line 3.

UART2. Transmit Data Output (TxD2).

P2.4

126

I/O

Port 2 General Purpose Input/Output data line 4.

BSPI1. Master Mode. Master Input/Slave Output line (MISO1).

BSPI1. Slave Mode. Master Input/Slave Output line (MISO1).

P2.5

127

I/O

Port 2 General Purpose Input/Output data line 5.

BSPI1. Master Mode. Master Output/Slave Input line (MOSI1).

BSPI1. Slave Mode. Master Output/Slave Input line (MOSI1).

P2.6

128

I/O

Port 2 General Purpose Input/Output data line 6.

BSPI1. Master Mode. Output serial clock (SCK1).

BSPI1. Slave Mode. Input serial clock (SCK1).

P2.7

131

I/O

Port 2 General Purpose Input/Output data line 7.

BSPI2. Master Mode. Master Input/Slave Output line (MISO2).

BSPI2. Slave Mode. Master Input/Slave Output line (MISO2).

P2.8

132

I/O

Port 2 General Purpose Input/Output data line 8.

BSPI2. Master Mode. Master Output/Slave Input line (MOSI2).

BSPI2. Slave Mode. Master Output/Slave Input line (MOSI2).

P2.9

133

I/O

Port 2 General Purpose Input/Output data line 9.

BSPI2. Master Mode. Output serial clock (SCK2).

BSPI2. Slave Mode. Input serial clock (SCK2).

STR720 数据表(PDF) 16 Page - STMicroelectronics

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