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参数资料
| 型号： | MC34704BEPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 34/54页 |
| 文件大小： | 0K |
| 描述： | IC PWR MNGMT DC-DC MULT 56-QFN |
| 特色产品： | MC34704 Multi-channel Power Management IC (PMIC) |
| 标准包装： | 1 |
| 应用： | 处理器 |
| 电流 - 电源： | 86mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-VFQFN 裸露焊盘 |
| 供应商设备封装： | 56-QFN-EP（7x7） |
| 包装： | 标准包装 |
| 产品目录页面： | 809 (CN2011-ZH PDF) |
| 其它名称： | MC34704BEPR2DKR |
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FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Dynamic Voltage Scaling Status Flag
LED Current
I MAX * (1/16)
I MAX * (2/16)
MSB
0
0
0
0
0
0
LSB
0
1
In addition and for each regulator, 34704 assigns 1 bit
( DVSSTATx ) to flag to the processor that the desired output
voltage level set with the DVSSETx bits has been reached.
I MAX * (3/16)
I MAX * (4/16)
I MAX * (5/16)
I MAX * (6/16)
0
0
0
0
0
0
1
1
1
1
0
0
0
1
0
1
DVS STATUS
DVS Not Done
DVS Done
bit
0
1
I MAX * (7/16)
I MAX * (8/16)
I MAX * (9/16)
I MAX * (10/16)
I MAX * (11/16)
0
0
1
1
1
1
1
0
0
0
1
1
0
0
1
0
1
0
1
0
USER ACCESSIBLE FAULT REGISTERS
Over-current Fault Register
The 34704 assigns 1 bit for each regulator ( ILIMFx ) to
indicate a fault due to over-current limit, where x corresponds
to each regulator from REG1 to REG8, except REG7
I MAX * (12/16)
I MAX * (13/16)
I MAX * (14/16)
I MAX * (15/16)
I MAX (Default)
1
1
1
1
1
0
1
1
1
1
1
0
0
1
1
1
0
1
0
1
ILIMF
False
True
Short-circuit Fault Register
bit
0
1
The 34704 assigns 1 bit for each regulator ( SCFx ) to
ACCURATE I 2 C COMMUNICATION MODE
The 34704 assigns 1 bit to enable the Accurate I 2 C
communication mode (ACCURATE). Setting this bit enables
the Accurate mode in which each command and data should
indicate a fault due to short-circuit current limit, where x
corresponds to each regulator from REG1 to REG8, except
REG7
be sent 2 times to avoid false commands.
USER ACCESSIBLE FLAG REGISTERS
Cold Start Flag
SCF
False
True
bit
0
1
The 34704 assigns 1 bit ( COLDF ) to flag the processor
that the power up was a result of battery insertion and not
through ONOFF pin. This flag should be cleared after power
up by the processor.
Over-voltage Fault Register
The 34704 assigns 1 bit for each regulator ( OVFx ) to
indicate a fault due to over-voltage limit, where x corresponds
to each regulator from REG1 to REG8
Cold Start Flag
/ONOFF (Default)
Battery Insertion
bit
0
1
OVF
False
True
bit
0
1
Shutdown Flag
The 34704 assigns 1 bit ( SHUTDOWN ) to flag the
processor if a shutdown signal is received through the
ONOFF pin and a programmable time period with a default of
1sec has elapsed.
Under-voltage Fault Register
The 34704 assigns 1 bit for each regulator ( UVFx ) to
indicate a fault due to under-voltage limit, where x
corresponds to each regulator from REG1 to REG8.
UVF
bit
/ONOFF Status
Normal (Default)
Shutdown
bit
0
1
False
True
Thermal Shutdown Fault Register
0
1
34704
Analog Integrated Circuit Device Data
34
Freescale Semiconductor
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