参数资料
型号: ST16C452CJ68TR-F
厂商: Exar Corporation
文件页数: 3/30页
文件大小: 0K
描述: IC UART W/PAR PORT DUAL 68PLCC
标准包装: 250
特点: *
通道数: 2,DUART
FIFO's: 1 字节
规程: 打印机
电源电压: 2.97 V ~ 5.5 V
带并行端口:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 68-LCC(J 形引线)
供应商设备封装: 68-PLCC
包装: 带卷 (TR)
11
ST16C452/452PS
Rev. 3.20
available at the user data interface, D0-D7. The user
optionally compares the received data to the initial
transmitted data for verifying error free operation of
the UART TX/RX circuits.
In this mode, the receiver and transmitter interrupts
are fully operational. The Modem Control Interrupts are
also operational. However, the interrupts can only be
read using lower four bits of the Modem Control Register
(MCR bits 0-3) instead of the four Modem Status
Register bits 4-7. The interrupts are still controlled by
the IER.
Figure 6, INTERNAL LOOP-BACK MODE DIAGRAM
D0-D7
-IOR
-IOW
-RESET
BIDEN
A0-A2
-CSA
-CSB
-CSP
INT A,B
INTP
TX A,B
RX A,B
D
a
ta
b
u
s
&
Co
nt
ro
lL
o
g
ic
Reg
is
ter
Se
le
ct
Log
ic
In
te
rr
u
p
t
Co
nt
ro
l
Log
ic
Transmit
Holding
Registers
Transmit
Shift
Register
Receive
Holding
Registers
Receive
Shift
Register
In
te
r
C
o
nn
ec
t
B
u
sL
in
es
&
C
o
n
tro
lsi
gn
a
ls
Clock
&
Baud Rate
Generator
CL
K
Printer
Data
Ports
PD0-PD7
Printer
Control
Logic
-STROBE
INIT
-AUTOFDX
-SELCTIN
PE, SELECT
-BUSY, -ACK
ERROR
M
o
de
m
Co
nt
ro
l
L
o
gi
c
-CTS
-RTS
-DTR
-DSR
-RI
-CD
(-OP1)
(-OP2)
M
CR
Bi
t-
4=
1
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