参数资料
| 型号： | MC33970DWR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 20/36页 |
| 文件大小： | 0K |
| 描述： | IC GAUGE DRIVER SPI 24-SOIC |
| 标准包装： | 1 |
| 应用： | 步进电机驱动器，2 相 |
| 输出数： | 2 |
| 电流 - 输出： | 100mA |
| 电压 - 负载： | 6.5 V ~ 26 V |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
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FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
table under POWER OUTPUT AND CLOCK TIMINGS ,
? 0 = Clock within spec
? 1 = Clock out of spec
OVUV (OD6) — Undervoltage or Overvoltage Indication. A
logic [1] on this bit indicates the V PWR voltage fell to a level
below the V PWRUV since the last SPI communication (refer to
the Static Electrical Characteristics table under POWER
an overvoltage event automatically disables the drive
outputs. Because the pointer may not be in the expected
position, the master may want to re-calibrate the pointer with
an RTZ command after the voltage returns to normal level.
For an overvoltage event, both gauges must be re-enabled
as soon as this flag returns to logic [0]. The state machine will
continue to operate properly as long as V DD is within the
normal range.
? 0 = Normal range
? 1 = Battery voltage fell below V PWRUV or exceeded
V PWROV
MOV1 (OD5) — This bit identifies Gauge 1 Movement
since last SPI communication. A logic [1] on this bit indicates
the Gauge 1 pointer position changed since the last SPI
command. This information allows the master to confirm the
pointer is moving as commanded.
? 0 = Gauge 1 position has not changed since the last SPI
command
? 1 = Gauge 1 pointer position has changed since the last
SPI command
MOV0 (OD4) — Gauge 0 Movement Since last SPI
Communication. A logic [1] on this bit indicates the Gauge 0
pointer position has changed since the last SPI command.
This information allows the master to confirm the pointer is
moving as commanded.
? 0 = Gauge 0 position has not changed since the last SPI
command
? 1 = Gauge 0 pointer position has changed since the last
SPI command
RTZ1 (OD3) — RTZ1 Is Enabled or Disabled. A logic [1] on
? 0 = Return to Zero disabled
? 1 = Return to Zero enabled successfully
RTZ0 (OD2) — RTZ0 Is Enabled or Disabled. A logic [1] on
this bit indicates Gauge 0 is in the process of returning to the
zero position as requested with the RTZ command. This bit
continues to indicate a logic [1] until the SPI message
following a detection of the zero position, or the RTZ feature
is commanded OFF using the RTZ message.
? 0 = Return to Zero disabled
? 1 = Return to Zero enabled successfully
OT1 (OD1) — Gauge 1 Junction Overtemperature. A
logic [1] on this bit indicates that the coil drive circuitry
dedicated to drive Gauge 1 has exceeded the maximum
allowable junction temperature since the last SPI
communication and that Gauge 1 has been disabled. It is
recommended that the pointer be re-calibrated using the RTZ
command after re-enabling the gauge using the PECCR
command. This bit remains logic [1] until the gauge is
enabled.
? 0 = Temperature within range
? 1 = Gauge 1 maximum allowable junction temperature
condition has been reached
OT0 (OD0) — Gauge 0 Junction Overtemperature. A
logic [1] on this bit indicates that the coil drive circuitry
dedicated to drive Gauge 0 has exceeded the maximum
allowable junction temperature since the last SPI
communication and that Gauge 0 has been disabled. It is
recommended that the pointer be re-calibrated using the RTZ
command after re-enabling the gauge using the PECCR
command. This bit remains logic [1] until the gauge is re-
enabled.
? 0 = Temperature within range
? 1 = Gauge 0 maximum allowable junction temperature
condition is reached
RTZ Accumulator Status Information
Most recent valid PECCR command resulting in the RTZ
Accumulator status output:
this bit indicates Gauge 1 is in the process of returning to the
zero position as requested with the RTZ command. This bit
will continue to indicate a logic [1] until the SPI message
D11
1
D10
0
D9
x
D8
x
following a detection of the zero position, or the RTZ feature
is commanded OFF using the RTZ message.
Table 16. RTZ Accumulator Status Output Register
x = Don’t care.
Bits
OD15
OD14
OD13
OD12
OD11
OD10
OD9
OD8
OD7
OD6
OD5
OD4
OD3
OD2
OD1
OD0
Read
RTZ
ACC14 ACC13 ACC12 ACC11
ACC10 ACC9 ACC8 ACC7 ACC6 ACC5 ACC4 ACC3 AC2C ACC1 ACC0
Write
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
The bits in Table 16 are read-only bits.
RTZ (OD15) — RTZ Bit Is Enabled or Disabled. A logic [1]
on this bit indicates that the Gauge is in the process of
returning to the zero position as requested with the RTZ
command. This bit will continue to indicate a logic [1] until the
SPI message following a detection of the zero position, or the
RTZ feature is commanded OFF using the RTZ message.
? 0 = Return to Zero disabled
33970
Analog Integrated Circuit Device Data
20
Freescale Semiconductor
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