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| 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： | 4/55页 |
| 文件大小： | 706K |
| 代理商： | 935270050128 |
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Philips Semiconductors
SC16C654/654D
Quad UART with 64-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 02 — 13 March 2003
12 of 52
9397 750 10985
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
character. In the 16 mode, INTSEL and MCR[3] can be congured to provide a
software controlled or continuous interrupt capability. Due to pin limitations of the
64-pin package, this feature is offered by two different LQFP64 packages. The
SC16C654D operates in the continuous interrupt enable mode by bonding INTSEL to
VCC internally. The SC16C654 operates in conjunction with MCR[3] by bonding
INTSEL to GND internally.
The PLCC68 SC16C654 package offers a clock select pin to allow system/board
designers to preset the default baud rate table. The CLKSEL pin selects the 1
× or 4×
pre-scalable baud rate generator table during initialization, but can be overridden
following initialization by MCR[7].
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 SC16C654/654D 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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