参数资料
型号: SC16C654IA68,512
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, PQCC68
封装: PLASTIC, MS-018, SOT-188-2, LCC-68
文件页数: 20/52页
文件大小: 647K
代理商: SC16C654IA68,512
Philips Semiconductors
SC16C654/654D
Quad UART with 64-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 04 — 19 June 2003
27 of 52
9397 750 11617
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
7.6 Modem Control Register (MCR)
This register controls the interface with the modem or a peripheral device.
Table 16:
LCR[5] parity selection
LCR[5]
LCR[4]
LCR[3]
Parity selection
X
0
no parity
0
1
ODD parity
0
1
EVEN parity
101force parity ‘1’
111forced parity ‘0’
Table 17:
LCR[2] stop bit length
LCR[2]
Word length
Stop bit length (bit times)
0
5, 6, 7, 8
1
15
1-1
2
1
6, 7, 8
2
Table 18:
LCR[1-0] word length
LCR[1]
LCR[0]
Word length
005
016
107
118
Table 19:
Modem Control Register bits description
Bit
Symbol
Description
7
MCR[7]
Clock select.
Logic 0 = Divide-by-1. The input clock (crystal or external) is
divided by 16 and then presented to the Programmable Baud Rate
Generator (BGR) without further modication, i.e., divide-by-1.
(normal default condition).
Logic 1 = Divide-by-4. The divide-by-1 clock described in MCR[7] =
a logic 0, if further divided by four. Also see Section 6.11
6
MCR[6]
IR enable.
Logic 0 = Enable the standard modem receive and transmit
input/output interface (normal default condition).
Logic 1 = Enable infrared IrDA receive and transmit inputs/outputs.
While in this mode, the TX/RX output/inputs are routed to the
infrared encoder/decoder. The data input and output levels will
conform to the IrDA infrared interface requirement. As such, while
in this mode, the infrared TX output will be a logic 0 during idle data
conditions.
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