參數(shù)資料
型號(hào)： SX18AC
廠商： Electronic Theatre Controls, Inc.
英文描述： Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug
中文描述： 配置通信控制器與電子工程/閃存程序存儲(chǔ)器，在系統(tǒng)編程能力和片上調(diào)試
文件頁(yè)數(shù)： 7/52頁(yè)
文件大?。?/td> 688K
代理商： SX18AC
2000 Scenix Semiconductor, Inc. All rights reserved.
- 7 -
www.scenix.com
SX18AC/SX20AC/SX28AC/SX18AC75/SX20AC75/SX28AC75
3.0
The device contains a 4-bit I/O port (Port A) and two 8-bit
I/O ports (Port B, Port C). Port A provides symmetrical
drive capability. Each port has three associated 8-bit reg-
isters (Direction, Data, TTL/CMOS Select, and Pull-Up
Enable) to configure each port pin as Hi-Z input or output,
to select TTL or CMOS voltage levels, and to enable/dis-
able the weak pull-up resistor. The upper four bits of the
registers associated with Port A are not used. The least
significant bit of the registers corresponds to the least
significant port pin. To access these registers, an appro-
priate value must be written into the MODE register.
Upon power-up, all bits in these registers are initialized to
“1”.
PORT DESCRIPTIONS
The associated registers allow for each port bit to be indi-
vidually configured under software control as shown
below:
Table 3-1. Port Configuration
3.1
The three ports are memory-mapped into the data mem-
ory address space. To the CPU, the three ports are avail-
able as the RA, RB, and RC file registers at data memory
addresses 05h, 06h, and 07h, respectively.
Reading and Writing the Ports
Writing to a port data register sets the voltage levels of
the corresponding port pins that have been configured to
operate as outputs. Reading from a register reads the
voltage levels of the corresponding port pins that have
been configured as inputs.
Data Direction
Registers:
RA, RB, RC
TTL/CMOS
Select Registers:
LVL_A, LVL_B,
LVL_C
Pullup Enable
Registers:
PLP_A, PLP_B,
PLP_C
0
1
0
1
0
1
Output
Hi-Z
Input
CMOS
TTL
Enable
Disable
Figure 3-1. Port A Configuration
MODE
RA
RA Data
LVL_A
0 = Output
1 = Hi-Z Input
WR
WR
0 = CMOS
1 = TTL
RD
TTL Buffer
CMOS Buffer
V
dd
Pullup
Port A PIN
I
M
U
X
M
M
M
WR
Direction
PLP_A
0 = Pullup Enable
1 = Pullup Disable
Port A INPUT
WR
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PDF描述
SX20AC Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug
SX20AC75 Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SX18AC/DP 功能描述:8位微控制器 -MCU DIP-18 8-BIT MICRO RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
SX18AC/SO 功能描述:8位微控制器 -MCU SO-18 8-BIT MICRO RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
SX18AC100-I/DP 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug
SX18AC100-I/PQ 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug
SX18AC100-I/SO 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug
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