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參數(shù)資料
| 型號： | MC33976 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Dual Gauge Driver with Configurable Response Time(帶可設(shè)置響應(yīng)時(shí)間的雙標(biāo)尺驅(qū)動器) |
| 中文描述： | 雙計(jì)驅(qū)動器，可配置的響應(yīng)時(shí)間（帶可設(shè)置響應(yīng)時(shí)間的雙標(biāo)尺驅(qū)動器） |
| 文件頁數(shù)： | 23/40頁 |
| 文件大?。?/td> | 5332K |
| 代理商： | MC33976 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
23
33976
FUNCTIONAL DEVICE OPERATION
COMMUNICATION MEMORY MAPS AND REGISTER DESCRIPTIONS
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 range1 = 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:
The bits in
Table 22
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
1 = Return to Zero enabled successfully
ACC14:ACC0 (OD14:OD0) — These 15 bits are from the
RTZ accumulator. They represent the integrated signal
present on the non-driven coil during an RTZ event. These
bits are logic [0] after power-on reset, or after the
RST
pin
transitions from logic [0] to [1]. After an RTZ event, they will
represent the last RTZ accumulator result before the RTZ
was stopped. ACC14 is the MSB and is the sign bit used for
zero detection. Negative numbers have MSB logic [1] and
are coded in two’s complement.
Gauge 0 Pointer Position Status Information
Most recent valid PECCR command resulting in the
Gauge 0 Pointer Position status output:
The bits in
Table 24
are
read-only
bits.
ENB0 (OD15) — This bit indicates whether Gauge 0 is
enabled.
0 = Disabled
1 = Enabled
DIR0 (OD14) — This bit indicates the direction Gauge 0 is
moving.
0 = Toward position 0
1 = Away from position 0
DIRC0 (OD13) — This bit is used to determine whether the
direction of the most recent pointer movement is toward the
last commanded position or away from it.
0 = Direction of the pointer movement is toward the
commanded position
1 = Direction of the pointer movement is away from the
commanded position
Table 21.
D11
D10
D9
D8
1
0
x
x
x = Don’t care.
Table 22. RTZ Accumulator Status Output Register
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
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Table 23.
D11
D10
D9
D8
1
1
0
0
Table 24. Gauge 0 Pointer Position Status Output Register
Bits
OD15
OD14
OD13
OD12
OD11
OD10
OD9
OD8
OD7
OD6
OD5
OD4
OD3
OD2
OD1
OD0
Read
ENB0
DIR0
DIRC0 CMD0 POS11 POS10 POS9
POS8
POS7
POS6
POS5
POS4
POS3
POS2
POS1
POS0
Write
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
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