收藏本站
参数资料
型号： 71M6542G-IGT/F
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： 模拟信号调理
英文描述： SPECIALTY ANALOG CIRCUIT, PQFP100
封装： LEAD FREE, LQFP-100
文件页数： 96/165页
文件大小： 2208K
代理商： 71M6542G-IGT/F
36
2008–2011 Teridian Semiconductor Corporation
v1.1
Table 15: Port Registers (SEGDIO0-15)
SFR
Name
SFR
Address
D7
D6
D5
D4
D3
D2
D1
D0
P0
0x80
DIO_DIR[3:0]
DIO[3:0]
P1
0x90
DIO_DIR[7:4]
DIO[7:4]
P2
0xA0
DIO_DIR[11:8]
DIO[11:8]
P3
0xB0
DIO_DIR[15:12]
DIO[15:11]
Ports P0-P3 on the chip are bi-directional and control SEGDIO0-15. Each port consists of a Latch (SFR
P0 to P3), an output driver and an input buffer, therefore the MPU can output or read data through any of
these ports. Even if a DIO pin is configured as an output, the state of the pin can still be read by the
MPU, for example when counting pulses issued via DIO pins that are under CE control.
At power-up SEGDIO0-15 are configured as inputs. It is necessary to write PORT_E = 1 (I/O RAM
0x270C[5]) to enable SEGDIO0-15. The default PORT_E = 0 blocks any momentary output
transient pulses that would otherwise occur when SEGDIO0-15 are reset on power-up.
Clock Stretching (CKCON)
The three low order bits of the CKCON[2:0] (SFR 0x8E) register define the stretch memory cycles that
are used for MOVX instructions when accessing external peripherals. The practical value of this register
for the 71M6541D/F and 71M6542F is to guarantee access to XRAM between CE, MPU, and SPI. The
default setting of CKCON[2:0] (001) should not be changed.
Table 16 shows how the signals of the External Memory Interface change when stretch values are set
from 0 to 7. The widths of the signals are counted in MPU clock cycles. The post-reset state of the
CKCON[2:0] (001), which is shown in bold in the table, performs the MOVX instructions with a stretch
value equal to 1.
Table 16: Stretch Memory Cycle Width
CKCON[2:0]
Stretch
Value
Read Signal Width
Write Signal Width
memaddr
memrd
memaddr
memwr
000
0
1
2
1
001
1
2
3
1
010
2
3
4
2
011
3
4
5
3
100
4
5
6
4
101
5
6
7
5
110
6
7
8
6
111
7
8
9
7
2.4.4
Instruction Set
All instructions of the generic 8051 microcontroller are supported. A complete list of the instruction set
and of the associated op-codes is contained in the 71M654X Software User’s Guide (SUG).
2.4.5
UARTs
The 71M6541D/F and 71M6542F include a UART (UART0) that can be programmed to communicate
with a variety of AMR modules and other external devices. A second UART (UART1) is connected to the
optical port, as described in 2.5.7 UART and Optical Interface.
The UARTs are dedicated 2-wire serial interfaces, which can communicate with an external host processor
at up to 38,400 bits/s (with MPU clock = 1.2288 MHz). The operation of the RX and TX UART0 pins is as
follows:
相关PDF资料
PDF描述
71M6541G-IGT/F SPECIALTY ANALOG CIRCUIT, PQFP64
71M6541F-IGT/F SPECIALTY ANALOG CIRCUIT, PQFP64
71M6543F-IGT/F SPECIALTY ANALOG CIRCUIT, PQFP100
71M6543H-IGTR/F SPECIALTY ANALOG CIRCUIT, PQFP100
71M6543F-IGTR/F SPECIALTY ANALOG CIRCUIT, PQFP100
相关代理商/技术参数
参数描述
71M6542G-IGTR/F 制造商:Maxim Integrated Products 功能描述:- Tape and Reel
71M6542GT-IGT/F 制造商:Maxim Integrated Products 功能描述:1-PHASE, 128KB, PRES TEMP SENSOR - Bulk
71M6542GT-IGTR/F 制造商:Maxim Integrated Products 功能描述:1-PHASE, 128KB, PRES TEMP SENSOR - Tape and Reel
71M6543F 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation
71M6543F-DB 功能描述:开发板和工具包 - 8051 71M6543 Eval Kit RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压:
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*