參數(shù)資料
型號: ST16C650ACJ44
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: 2.90V TO 5.5V UART WITH 32-BYTE FIFO
中文描述: 1 CHANNEL(S), 3.125M bps, SERIAL COMM CONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 8/53頁
文件大小: 666K
代理商: ST16C650ACJ44
ST16C650A
2.90V TO 5.5V UART WITH 32-BYTE FIFO
á
REV. 5.0.0
8
2.0
FUNCTIONAL DESCRIPTIONS
2.1
The host interface is 8 data bits wide with 3 address lines and control signals to execute bus read and write
transactions. The 650A supports 3 type of host interfaces: Intel, Motorola and PC mode. The Intel and
Motorola interfaces provide support for their respective microcontroller or processor. This facilitates the
hardware design and interconnections. The Intel bus interface is selected by connecting IM# to logic 0 and
SEL to logic 1. The Intel bus interconnections are shown in
Figure 3
. The Motorola bus is selected with the IM#
input connected to logic 1 and SEL input ties to logic 1. The Motorola bus interconnections are shown in
Figure 4
. The special PC mode is selected when IM# and SEL are connected to logic 0. The PC mode
interconnections are shown in
Figure 5
.
Host Data Bus Interface
T
F
IGURE
3. ST16C650A I
NTEL
B
US
I
NTERCONNECTIONS
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
IOR*
IOW *
RESET
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW #
A0
A1
A2
CS2#
RESET
VCC
CS0
CS1
AS#
GND
IOR
IOW
INT
INT
RCLK
BAUDOUT#
PCMODE#
IM#
VCC
CS#
OP2#
OP1#
DSR#
CD#
CTS#
RTS#
DTR#
RX
TX
RI#
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