參數(shù)資料
型號: XR16L651
廠商: Exar Corporation
英文描述: 2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO(2.5V, 3.3V和5V 低功耗通用異步接收器/發(fā)送器(帶32字節(jié)先進先出))
中文描述: 2.5V,3.3V與5V的低功耗的UART與32字節(jié)的FIFO(2.5伏,3.3伏和5V的低功耗通用異步接收器/發(fā)送器(帶32字節(jié)先進先出))
文件頁數(shù): 7/46頁
文件大小: 516K
代理商: XR16L651
á
XR16L651
2.5V, 3.3 AND 5V LOW POWER UART WITH 32-BYTE FIFO
PRELIMINARY
REV. P1.0.0
7
FUNCTIONAL DESCRIPTIONS
1.0
The host interface is a 8 data bit wide with 3 address
lines and control signals to execute bus read and
write transactions. The 651 supports 3 type of host in-
terfaces: Intel, Morotola and PC mode. The Intel and
Motorola interfaces provide support for their respec-
tive microcontroller or processor. This facilitates the
hardware design and interconnections. The Intel bus
HOST DATA BUS INTERFACE
interface is selected by connecting IM# to logic 0 and
PCMODE# to logic 1. The Intel bus interconnections
are shown in Figure 3. The Motorola bus is selected
with the IM# input connected to logic 0 and PC-
MODE# input ties to logic 1. The Motorola bus inter-
connections are shown in Figure 4. The special PC
mode is selected when IM# and PCMODE# are con-
nected to logic 0. The PC mode interconnections are
shown in Figure 5.
T
F
IGURE
3. XR16L651 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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