- 您现在的位置：买卖IC网 > PDF目录11818 > IS82C52Z96 (Intersil)IC CTRLR CMOS SERIAL 28-PLCC PDF资料下载
参数资料
| 型号： | IS82C52Z96 |
| 厂商： | Intersil |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR CMOS SERIAL 28-PLCC |
| 标准包装： | 750 |
| 特点： | 单芯片 UART/BRG |
| 通道数： | 1，UART |
| 规程： | RS232C |
| 电源电压： | 4.5 V ~ 5.5 V |
| 带并行端口： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 带卷 (TR) |
5
FN2950.3
April 26, 2006
Reset
During and after power-up, the 82C52 Reset Input (RST)
must be held high for at least two IX clock cycles in order to
initialize and drive the 82C52 circuits to an idle mode until
proper programming can be done. A high on RST causes
the following events to occur
Resets the internal Baud Rate Generator (BRG) circuit
clock counters and bit counters. The Baud Rate Select
Register (BRSR) is not affected (except for bit 7 which is
reset to 0).
Clears the UART Status Register (USR) except for
Transmission Complete (TC) and Transmit Buffer Register
Empty (TBRE) which are set. The Modem Control
Register (MCR) is also cleared. All of the discrete lines,
memory elements and miscellaneous logic associated
with these register bits are also cleared or turned off. Note
that the UART Control Register (UCR) is not affected.
Following removal of the reset condition (RST = low), the
82C52 remains in the idle mode until programmed to its
desired system configuration.
Programming The 82C52
The complete functional definition of the 82C52 is
programmed by the systems software. A set of control words
(UCR, BRSR and MCR) must be sent out by the CPU to
initialize the 82C52 to support the desired communication
format. These control words will program the character
length, number of stop bits, even/odd/no parity, baud rate,
etc. Once programmed, the 82C52 is ready to perform its
communication functions.
The control registers can be written to in any order. However,
the MCR should be written to last because it controls the
interrupt enables, modem control outputs and the receiver
enable bit. Once the 82C52 is programmed and operational,
these registers can be updated any time the 82C52 is not
immediately transmitting or receiving data.
Table 1. Shows the control signals required to access 82C52
internal registers.
UART Control Register (UCR)
The UCR is a write only register which configures the UART
transmitter and receiver circuits. Data bits D7 and D6 are not
used but should always be set to a logic zero (0) in order to
insure software compatibility with future product upgrades.
During the Echo Mode, the transmitter always repeats the
received word and parity, even when the UCR is
programmed with different or no parity. See Figure 1.
Baud Rate Select Register (BRSR)
The 82C52 is designed to operate with a single crystal or
external clock driving the IX input pin. The Baud Rate Select
Register is used to select the divide ratio (one of 72) for the
internal Baud Rate Generator circuitry. The internal circuitry
is separated into two separate counters, a Prescaler and a
Divisor Select. The Prescaler can be set to any one of four
division rates,
÷1, ÷3, ÷4, or ÷5.
TABLE 1.
CS0
A1
A0
WR
RD
OPERATION
00001
Data Bus
→ Transmitter Buffer
Register (TBR)
00010
Receiver Buffer Register
(RBR)
→ Data Bus
00101
Data Bus
→ UART Control
Register (UCR)
00110
UART Status Register
(USR)
→ Data Bus
01001
Data Bus
→ Modem Control
Register (MCR)
01010
MCR
→ Data Bus
01101
Data Bus
→ Bit Rate Select
Register (BRSR)
01110
Modem Status Register
(MSR)
→ Data Bus
D7 D6 D5 D4 D3 D2 D1 D0
Stop Bit
Select
0 = 1 Stop Bits
1 = 1.5 Stop Bits (Tx)
and 1 Stop Bit (Rx)
If 5 Data Bits Selected
1 = 2 Stop Bits for 6, 7
or 8 Data Bits Selected
Parity
Control
000 = Tx and Rx Even
001 = Tx and Rx Odd
010 = Tx Even, Rx
Odd
011 = Tx Odd, Rx
Even
100 = Tx Even, Rx
Check Disabled
101 = Tx Odd, Rx
Check Disabled
11X = Generation and
Check Disabled
Word
Length
Select
00 = 5 Bits
01 = 6 Bits
10 = 7 Bits
11 = 8 Bits
Reserved Set to 00 for Future
Product Upgrade
Compatibility
FIGURE 1. UCR
82C52
相关PDF资料 |
PDF描述 |
|---|---|
| CS82C52Z | IC CONTROLLER UART 28-PLCC |
| CS82C52Z96 | IC UART/BRG 5V 16MHZ 28-PLCC |
| IS82C50A-5 | IC PERIPH UART/BRG 10MHZ 44-PLCC |
| IS82C50A-5Z | IC PERIPH UART/BRG 10MHZ 44-PLCC |
| ATMEGA329-16MUR | MCU AVR 32K FLASH 16MHZ 64QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IS82C54 | 功能描述:计时器和支持产品 PERIPH PRG-CNTR 5V 8MHZ 28PLCC IND RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| IS82C54-10 | 功能描述:计时器和支持产品 PERIPH PRG-CNTR 5V 10MHZ 28PLCC IND RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| IS82C54-1096 | 功能描述:计时器和支持产品 PERIPH PRG-CNTR 5V 10MHZ 28PLCC INDEL RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| IS82C54-10Z | 功能描述:计时器和支持产品 PERIPH PRG-CNTR 5V 1 0MHZ 28PLCC IND RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| IS82C54-10Z96 | 功能描述:计时器和支持产品 W/ANNEAL PERIPH PRG- CNTR 5V 10MHZ RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。