收藏本站
71M6545/71M6545H Data Sheet
5.3
Reading the Info Page (71M6545H only)
High precision trim fuse values provided in the 71M6545H device cannot be directly accessed through the
I/O RAM space. These trim fuses reside in a special area termed the “Info Page”. The MPU gains access
to the Info Page by setting the INFO_PG ( I/O RAM 0x270B[0] ) control bit. Once the INFO_PG bit is set, Info
Page contents are accessible in program memory space based at the address specified by the contents
of CE_LCTN[5:0] ( I/O RAM 0x2109[5:0] ). CE_LCTN[5:0] specifies a base address at a 1KB address
boundary. Thus, the base address for the Info Page is at 1024* CE_LCTN[5:0]. Table 62 provides a list of
the available 71M6545H trim fuses and their corresponding offsets relative to the Info Page base
address. After reading the desired Info Page information, the MPU must reset the INFO_PG bit.
Table 62. Info Page Trim Fuses
Trim Fuse
TEMP_85[10:8]
TEMP_85[7:0]
(11-bits)
TRIMBGB[15:8]
TRIMBGB[7:0]
(16-bits)
TRIMBGD[7:0]
(8-bits)
Object Size
8-bits
8-bits
8-bits
8-bits
8-bits
Address Offset
0x90
0x91
0x92
0x93
0x94
Comments
TEMP_85[10:0] holds the
STEMP[10:0] reading at 85°C.
2’s complement format
TRIMBGB[15:0] holds the
deviation of VREF from its ideal
value (1.195V) at 85°C.
LSB = 0.1 mV
2’s complement format
TRIMBGD[7:0] holds the
deviation of VREF from its ideal
value (1.195V) at 22°C.
LSB = 0.1 mV
2’s complement format
Figure 33. Trim Fuse Bit Mapping
Offset
0x90
0x91
0x92
0x93
0x94
Name
TEMP_85[10:0]
TRIMBGB[15:0]
TRIMBGD[7:0]
Bit 7
Bit 6
Bit 5
Bit 4 Bit 3
TEMP_85[7:0]
TRIMBGB[15:8]
TRIMBGB[7:0]
TRIMBGD[7:0]
Bit 2 Bit 1 Bit 0
TEMP_85[10:8]
The code below provides an example for reading Info Page fuse trims. In this code example, the address,
"px" is a pointer to the MPU’s code space. In assembly language, the Info Page data objects, which are
read-only, must be accessed with the MOVC 8051 instruction.
In C, Info Page trim fuses must be fetched with a pointer of the correct width, depending whether an 8-bit
or a 16-bit data object is to be fetched. The case statements in the code example below perform casts to
obtain a pointer of the correct size for each object, as needed.
In assembly language, the MPU has to form 11-bit or 16-bit values from two separate 8-bit fetches,
depending on the object being fetched.
The byte values containing less than 8 valid bits are LSB justified. For example Info Page offset 0x90 is
an 8-bit object, whose three LSBs are bits [10:8] of the complete TEMP_85[10:0] 11-bit object. The Info
Page data objects are 2’s complement format and should be sign extended when read into a 16-bit data
type (see case _TEMP85 in the code example).
98
v2
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

*
*
*
相关PDF资料
720-10007-00300 CBL D-SUB 9PIN FMAL-25PIN FML 3M
720-10010-00025 CBL DSUB 9PIN FML-25PIN MAL .25M
720-10020-00300 CBL DSUB 9PIN FML-9PIN MALE 3M
720-10021-00300 CBL DSUB 9PIN FML-9PIN FEMAL 3M
72231-0881 8 POS T/P SHLD 4 GR ASSY
7250B PANEL KIT BOTTOM FOR R-1220 CASE
731-10061-00200 CBL DSUB HD 15FEMAL-15MALE 2.0M
73304-111 MJ HOR ESMT 8/8 H/O T&R
相关代理商/技术参数
71M6545-IGTR/F 功能描述:计量片上系统 - SoC Metrology Proc. (3P 64K Flsh .1%) RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6545T-IGT/F 制造商:Maxim Integrated Products 功能描述:METROLOGY PROCESSORS - Rail/Tube
71M6545T-IGTR/F 制造商:Maxim Integrated Products 功能描述:3-PHASE AFE, 32KB FLASH, PRES TEMP SENSOR - Tape and Reel
71M6601 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring
71M6601-IF 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring
71M6601-IL 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring
71M6601-IL/F 功能描述:模数转换器 - ADC Isolated Sensor IC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
71M6601-ILF 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring