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ST16C2552CJ44 Folha de dados(PDF) 4 Page - Exar Corporation |
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ST16C2552CJ44 Folha de dados(HTML) 4 Page - Exar Corporation |
4 / 36 page ST16C2552 4 2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO REV. 4.2.1 MFA# 35 O Multi-Function Output Channel A. This output pin can function as the OP2A#, BAUD- OUTA#, or RXRDYA# pin. One of these output signal functions can be selected by the user programmable bits 1-2 of the Alternate Function Register (AFR). These sig- nal functions are described as follows: 1) OP2A# - When OP2A# (active low) is selected, the MF# pin is a logic 0 when MCR bit-3 is set to a logic 1 (see MCR bit-3). MCR bit-3 defaults to a logic 1 condition after a reset or power-up. 2) BAUDOUTA# - When BAUDOUTA# function is selected, the 16X Baud rate clock output is available at this pin. 3) RXRDYA# - RXRDYA# (active low) is intended for monitoring DMA data transfers. See Table 2 for more details. If it is not used, leave it unconnected. MFB# 19 O Multi-Function Output ChannelB. This output pin can function as the OP2B#, BAUD- OUTB#, or RXRDYB# pin. One of these output signal functions can be selected by the user programmable bits 1-2 of the Alternate Function Register (AFR). These sig- nal functions are described as follows: 1) OP2B# - When OP2B# (active low) is selected, the MF# pin is a logic 0 when MCR bit-3 is set to a logic 1 (see MCR bit-3). MCR bit-3 defaults to a logic 1 condition after a reset or power-up. 2) BAUDOUTB# - When BAUDOUTB# function is selected, the 16X Baud rate clock output is available at this pin. 3) RXRDYB# - RXRDYB# (active low) is intended for monitoring DMA data transfers. See Table 2 for more details. If it is not used, leave it unconnected. TXA 38 O UART channel A Transmit Data. If it is not used, leave it unconnected. RXA 39 I UART channel A Receive Data. Normal receive data input must idle at logic 1 condi- tion. If it is not used, tie it to VCC or pull it high via a 100k ohm resistor. RTSA# 36 O UART channel A Request-to-Send (active low) or general purpose output. If it is not used, leave it unconnected. CTSA# 40 I UART channel A Clear-to-Send (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. DTRA# 37 O UART channel A Data-Terminal-Ready (active low) or general purpose output. If it is not used, leave it unconnected. DSRA# 41 I UART channel A Data-Set-Ready (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. CDA# 42 I UART channel A Carrier-Detect (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. Pin Description NAME 44-PLCC PIN # TYPE DESCRIPTION |
Nº de peça semelhante - ST16C2552CJ44 |
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Descrição semelhante - ST16C2552CJ44 |
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