参数资料
型号: 935270050128
厂商: NXP SEMICONDUCTORS
元件分类: 微控制器/微处理器
英文描述: 4 CHANNEL(S), 5M bps, SERIAL COMM CONTROLLER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件页数: 17/55页
文件大小: 706K
代理商: 935270050128
Philips Semiconductors
SC16C654/654D
Quad UART with 64-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 02 — 13 March 2003
24 of 52
9397 750 10985
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Transmit operation in mode ‘1’: When the SC16C654/654D is in FIFO
mode (FCR[0] = logic 1; FCR[3] = logic 1), the TXRDY pin will be a
logic 1 when the transmit FIFO is completely full. It will be a logic 0 when
the trigger level has been reached.
Receive operation in mode ‘1’: When the SC16C654/654D is in FIFO
mode (FCR[0] = logic 1; FCR[3] = logic 1) and the trigger level has been
reached, or a Receive Time-Out has occurred, the RXRDY pin will go to
a logic 0. Once activated, it will go to a logic 1 after there are no more
characters in the FIFO.
2
FCR[2]
XMIT FIFO reset.
Logic 0 = No FIFO transmit reset (normal default condition).
Logic 1 = Clears the contents of the transmit FIFO and resets the
FIFO counter logic (the transmit shift register is not cleared or
altered). This bit will return to a logic 0 after clearing the FIFO.
1
FCR[1]
RCVR FIFO reset.
Logic 0 = No FIFO receive reset (normal default condition).
Logic 1 = Clears the contents of the receive FIFO and resets the FIFO
counter logic (the receive shift register is not cleared or altered). This
bit will return to a logic 0 after clearing the FIFO.
0
FCR[0]
FIFO enable.
Logic 0 = Disable the transmit and receive FIFO (normal default
condition).
Logic 1 = Enable the transmit and receive FIFO. This bit must be a
‘1’ when other FCR bits are written to, or they will not be
programmed.
Table 11:
RCVR trigger levels
FCR[7]
FCR[6]
RX FIFO trigger level
0008
0116
1056
1160
Table 12:
TX trigger levels
FCR[5]
FCR[4]
TX FIFO trigger level (# of characters)
0008
0116
1032
1156
Table 10:
FIFO Control Register bits description…continued
Bit
Symbol
Description
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