欢迎访问ic37.com |
会员登录 免费注册
发布采购

71M6543H 参数 Datasheet PDF下载

71M6543H图片预览
型号: 71M6543H
PDF下载: 下载PDF文件 查看货源
内容描述: 可选增益1或8的一个电流电能表计量芯片的补偿 [Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation]
分类和应用:
文件页数/大小: 157 页 / 2164 K
品牌: MAXIM [ MAXIM INTEGRATED PRODUCTS ]
 浏览型号71M6543H的Datasheet PDF文件第52页浏览型号71M6543H的Datasheet PDF文件第53页浏览型号71M6543H的Datasheet PDF文件第54页浏览型号71M6543H的Datasheet PDF文件第55页浏览型号71M6543H的Datasheet PDF文件第57页浏览型号71M6543H的Datasheet PDF文件第58页浏览型号71M6543H的Datasheet PDF文件第59页浏览型号71M6543H的Datasheet PDF文件第60页  
71M6543F/H and 71M6543G/GH Data Sheet  
Table 46 shows the I/O RAM registers used for temperature and battery measurement.  
If TEMP_PWR selects VBAT_RTC when the battery is nearly discharged, the temperature  
measurement may not finish. In this case, firmware may complete the measurement by selecting  
V3P3D (TEMP_PWR = 1).  
Table 46: I/O RAM Registers for Temperature and Battery Measurement  
Name  
Location Rst  
Wk Dir Description  
Indicates that hardware is still writing the 0x28A0  
TBYTE_BUSY  
28A0[3]  
0
0
0
R
byte. Additional writes to this byte are locked out  
while it is one. Write duration could be as long as 6 ms.  
Sets the period between temperature measurements.  
Automatic measurements can be enabled in any  
mode (MSN, BRN, LCD, or SLP).  
Time  
TEMP_PER  
TEMP_PER[2:0]  
28A0[2:0]  
R/W  
Manual updates (see TEMP_START)  
2 ^ (3+TEMP_PER) (seconds)  
Continuous  
0
1-6  
7
Causes VBAT to be measured whenever a  
temperature measurement is performed.  
TEMP_BAT  
28A0[4]  
28B4[6]  
0
0
R/W  
R/W  
TEMP_PER[2:0] must be zero in order for TEMP_START  
to function. If TEMP_PER[2:0] = 0, then setting  
TEMP_START starts a temperature measurement.  
Ignored in SLP and LCD modes. Hardware clears  
TEMP_START when the temperature measurement is  
complete.  
TEMP_START  
Selects the power source for the temperature sensor:  
1 = V3P3D, 0 = VBAT_RTC. This bit is ignored in  
SLP and LCD modes, where the temperature sensor is  
always powered by VBAT_RTC.  
TEMP_PWR  
TEMP_BSEL  
28A0[6]  
28A0[7]  
0
0
R/W  
R/W  
Selects which battery is monitored by the  
temperature sensor: 1 = VBAT, 0 = VBAT_RTC  
Test bits for the temperature monitor VCO.  
TEMP_TEST must be 00 in regular operation. Any  
other value causes the VCO to run continuously with  
the control voltage described below.  
TEMP_TEST[1:0]  
2500[1:0]  
0
R/W  
Function  
TEMP_TEST  
00  
01  
1X  
Normal operation  
Reserved for factory test  
Reserved for factory test  
STEMP[10:3]  
STEMP[2:0]  
2881[7:0]  
2882[7:5]  
R
R
The result of the temperature measurement.  
The STEMP[10:0] value may be obtained in C with a  
single 16-bit read and divide by 32 operation as  
follows:  
volatile int16_t xdata STEMP _at_0x2881;  
fa = (float)(STEMP/32);  
BSENSE[7:0]  
BCURR  
2885[7:0]  
2704[3]  
0
0
R
The result of the battery measurement.  
Connects a 100 µA load to the battery selected by  
TEMP_BSEL.  
R/W  
2.5.6 71M6xx3 Temperature Sensor  
56 © 2008–2011 Teridian Semiconductor Corporation  
v1.2