参数资料
型号: ST16C552CJ68TR-F
厂商: Exar Corporation
文件页数: 19/39页
文件大小: 0K
描述: IC UART FIFO 16B DUAL 68PLCC
标准包装: 250
特点: *
通道数: 2,DUART
FIFO's: 16 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)
其它名称: ST16C552CJ68TR-F-ND
26
ST16C552/552A
Rev. 3.40
Logic 0 = -SLCTIN output is set to a logic 1. (normal
default condition)
Logic 1 = -SLCTIN output is set to a logic 0.
CON BIT-4:
This bit enables or masks the printer interrupt output
-INTP. The state of this bit can be read using COM bit-
4.
Logic 0 = Disable -INTP output. (normal default con-
dition)
Logic 1 = Enable -INTP output.
CON BIT-5:
This bit is used in conjunction with the state of BIDEN
to set the direction (input/output) of the PD7-PD0 data
bus.
Logic 0 + BIDEN 1 = PD7-PD0 are set for output mode
(normal default condition)
Logic 1 + BIDEN 1 = PD7-PD0 are set for input mode
CON BIT 6-7:
Not Used - initialized to a logic 1.
ST16C552/552A EXTERNAL RESET CONDITION
REGISTERS
RESET STATE
(UART)
IER
BITS 0-7=0
ISR
ISR BIT-0=1, ISR BITS 1-7=0
LCR
LCR BITS 0-7=0
MCR
MCR BITS 0-7=0
LSR
LSR BITS 0-4=0,
LSR BITS 5-6=1 LSR, BIT 7=0
MSR
MSR BITS 0-3=0,
MSR BITS 4-7=input signals
FCR
FCR BITS 0-7=0
REGISTERS
RESET STATE
Printer Port
IOSEL
IOSEL BITS-0-7=0
SR
SR BITS 0-1=1, BITS 2-7=input
signals
COM
COM BITS 0-4=0, BITS 5-7=1
CON
CON BITS 0-5=0, BITS 6-7=1
SIGNALS
RESET STATE
TX A/B
High
-RTS A/B
High
-DTR A/B
High
INT A/B, P
Three state mode
-RXRDY A/B
High
-TXRDY A/B
Low
PD0-PD7
Low, output mode
-STROBE
High, output mode
-AutoFDXT
High, output mode
INIT
Low, output mode
-SLCTIN
High, output mode
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