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参数资料
| 型号： | DS2438Z+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/29页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR SMART BATTERY 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 智能电池 |
| 电源电压： | 2.4 V ~ 10 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
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DS2438
Recall Memory [B8hxxh]
This command recalls the stored values in EEPROM / SRAM page xxh to the scratchpad page xxh. This
command must proceed a Read SPxx command in order to read any page of memory on the DS2438.
Valid page numbers are 00h - 07h.
Convert T [44h]
This command begins a temperature conversion. No further data is required. The temperature conversion
will be performed, setting the TB flag in the Status/Configuration register to a “1” during conversion.
When the temperature conversion is done, the TB flag will clear to a “0”. If the bus master issues read
time slots following this command, the DS2438 will output “0” on the bus as long as it is busy making a
temperature conversion; it will return a “1” when the temperature conversion is complete.
Convert V [B4h]
This command instructs the DS2438 to initiate a voltage analog-to-digital conversion cycle. This sets the
ADB flag (see Status/Configuration register discussion in the Memory Map section). The voltage supply
that is measured is defined by the AD bit of the Status/Configuration register. When the A/D conversion
is done, the ADB flag is cleared and the current voltage value is placed in the VOLTAGE REGISTER of
page 00h. While an A/D conversion is taking place, all other memory functions are still available for use.
If the bus master issues read time slots following this command, the DS2438 will output “0” on the bus as
long as it is busy making a voltage measurement; it will return a “1” when the conversion is complete.
DS2438 COMMAND SET Table 11
INSTRUCTION
DESCRIPTION
PROTOCOL
1-WIRE BUS
MASTER STATUS
AFTER ISSUING
PROTOCOL
1-WIRE BUS
DATA AFTER
ISSUING
PROTOCOL
MEMORY COMMANDS
Read Scratchpad
Write Scratchpad
Copy Scratchpad
Reads bytes from
DS2438 Scratchpad
page xxh
Writes bytes to
DS2438
Scratchpad page xxh
Copies entire contents
of Scratchpad page
xxh
BEh <page
00h-07h>
4Eh <page
00h-07h>
48h<page
00h-07h>
Rx
Tx
Idle or Rx of NVB bit
<read up to nine
bytes of data>
<write up to eight
bytes of data>
{NVB bit in Status
Register = 1 until
copy complete (2-
to 8-byte EEPROM/
SRAM page xxh
10 ms, typ)}
Recall Memory
Copies entire contents
of EEPROM/SRAM
page xxh to
Scratchpad
B8h<page
00h-07h>
Idle
Idle
page xxh
REGISTER COMMANDS
Convert T
Initiates temperature
conversion
44h
Idle or Rx of TB bit
{TB bit in Status
Register = 1 until
conversion
complete}
Convert V
Initiates voltage A/D
conversion
B4h
Idle or Rx of ADB bit
{ADB bit in Status
Register = 1 until
conversion
complete}
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