参数资料
型号: SC16C2550IB48,128
厂商: NXP Semiconductors
文件页数: 21/46页
文件大小: 0K
描述: IC DUART SOT313-2
标准包装: 2,000
特点: 2 通道
通道数: 2,DUART
FIFO's: 16 字节
电源电压: 2.5V,3.3V,5V
带自动流量控制功能:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 管件
其它名称: 935270020128
SC16C2550IB48-T
SC16C2550IB48-T-ND
Philips Semiconductors
SC16C2550
Dual UART with 16 bytes of transmit and receive FIFOs and IrDA
encoder/decoder
Product data
Rev. 03 — 19 June 2003
28 of 46
9397 750 11621
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
[1]
When using a software ow control the Xon/Xoff characters cannot be used for data transfer.
5
EFR[5]
Special Character Detect.
Logic 0 = Special character detect disabled (normal default condition).
Logic 1 = Special character detect enabled. The SC16C2550 compares
each incoming receive character with Xoff2 data. If a match exists, the
received data will be transferred to FIFO and ISR[4] will be set to
indicate detection of special character. Bit-0 in the X-registers
corresponds with the LSB bit for the receive character. When this feature
is enabled, the normal software ow control must be disabled (EFR[3-0]
must be set to a logic 0).
4
EFR[4]
Enhanced function control bit. The content of IER[7-4], ISR[5-4], FCR[5-4],
and MCR[7-5] can be modied and latched. After modifying any bits in the
enhanced registers, EFR[4] can be set to a logic 0 to latch the new values.
This feature prevents existing software from altering or overwriting the
SC16C2550 enhanced functions.
Logic 0 = disable/latch enhanced features. IER[7-4], ISR[5-4], FCR[5-4],
and MCR[7-5] are saved to retain the user settings, then IER[7-4]
ISR[5-4], FCR[5-4], and MCR[7-5] are set to a logic 0 to be compatible
with SC16C554 mode. (Normal default condition.)
Logic 1 = Enables the enhanced functions. When this bit is set to a
logic 1, all enhanced features of the SC16C2550 are enabled and user
settings stored during a reset will be restored.
3-0
EFR[3-0] Cont-3-0 Tx, Rx control. Logic 0 or cleared is the default condition.
Combinations of software ow control can be selected by programming
these bits. See Table 21.
Table 21:
Software ow control functions[1]
Cont-3
Cont-2
Cont-1
Cont-0
TX, RX software ow controls
0
X
No transmit ow control
1
0
X
Transmit Xon1/Xoff1
0
1
X
Transmit Xon2/Xoff2
1
X
Transmit Xon1 and Xon2/Xoff1 and Xoff2
X
0
No receive ow control
X
1
0
Receiver compares Xon1/Xoff1
X
0
1
Receiver compares Xon2/Xoff2
1
0
1
Transmit Xon1/Xoff1
Receiver compares Xon1 and Xon2, Xoff1 and Xoff2
0
1
Transmit Xon2/Xoff2
Receiver compares Xon1 and Xon2/Xoff1 and Xoff2
1
Transmit Xon1 and Xon2/Xoff1 and Xoff2
Receiver compares Xon1 and Xon2/Xoff1 and Xoff2
Table 20:
Enhanced Feature Register bits description…continued
Bit
Symbol
Description
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