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参数资料
| 型号： | 935271490512 |
| 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： | 6/56页 |
| 文件大小： | 715K |
| 代理商： | 935271490512 |
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Philips Semiconductors
SC16C554/554D
Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 02 — 13 March 2003
14 of 53
9397 750 11002
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
6.1 Interface options
Two user interface modes are selectable for the PLCC68 package. These interface
modes are designated as the ‘16 mode’ and the ‘68 mode’. This nomenclature
corresponds to the early 16C454/554 and 68C454/554 package interfaces
respectively.
6.2 The 16 mode interface
The 16 mode congures the package interface pins for connection as a standard
16 series (Intel) device and operates similar to the standard CPU interface available
on the 16C454/554. In the 16 mode (pin 16/68 = logic 1), each UART is selected with
individual chip select (CSx) pins, as shown in Table 3.
6.3 The 68 mode interface
The 68 mode congures the package interface pins for connection with Motorola, and
other popular microprocessor bus types. The interface operates similar to the
68C454/554. In this mode, the SC16C554/554D decodes two additional addresses,
A3-A4, to select one of the four UART ports. The A3-A4 address decode function is
used only when in the 68 mode (16/68 = logic 0), and is shown in Table 4.
Table 3:
Serial port channel selection, 16 mode interface
CSA
CSB
CSC
CSD
UART channel
1111
none
0111A
1011B
1101C
1110D
Table 4:
Serial port channel selection, 68 mode interface
CS
A4
A3
UART channel
1
n/a
none
000A
001B
010C
011D
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