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参数资料
| 型号： | ISL29021IROZ-EVALZ |
| 厂商： | Intersil |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR ISL29021IROZ |
| 标准包装： | 1 |
| 系列： | * |
ISL29021
Register Set
There are eight registers that are available in the ISL29021. Table 1 summarizes their functions.
TABLE 1. REGISTER SET
BIT
ADDR
00h
01h
02h
03h
04h
05h
06h
07h
REG NAME
COMMAND I
COMMAND II
DATA LSB
DATA MSB
INT_LT_LSB
INT_LT_MSB
INT_HT_LSB
INT_HT_MSB
7
OP2
1
D7
D15
TL7
TL15
TH7
TH15
6
OP1
FREQ
D6
D14
TL6
TL14
TH6
TH14
5
OP0
IS1
D5
D13
TL5
TL13
TH5
TH13
4
0
IS0
D4
D12
TL4
TL12
TH4
TH12
3
0
RES1
D3
D11
TL3
TL11
TH3
TH11
2
FLAG
RES0
D2
D10
TL2
TL10
TH2
TH10
1
PRST1
RANGE1
D1
D9
TL1
TL9
TH1
TH9
0
PRST0
RANGE0
D0
D8
TL0
TL8
TH0
TH8
DEFAULT
00h
00h
00h
00h
00h
00h
FFh
FFh
.
Command Register I 00(hex)
TABLE 4. INTERRUPT PERSIST
The first command register has the following functions:
1. Operation Mode: Bits 7, 6, and 5.These three bits
determines the operation mode of the device.
TABLE 2. OPERATION MODE
BITS 1 TO 0
00
01
10
NUMBER OF INTEGRATION CYCLES
1
4
8
BITS 7 TO 5
OPERATION
11
16
000
001
010
011
100
101
110
111
Power-down the device
Reserved (Do not use)
IR once
Proximity once
Reserved (Do not use)
Reserved (Do not use)
IR continuous
Proximity continuous
Command Register II 01(hex)
The second command register has the following functions:
1. Proximity Sensing Scheme: Bit 7. This bit programs the
function of the proximity detection. Logic 1 of this bit,
Scheme 1, makes n-1 (3, 7, 11, 15) bits (2’s
complementary) proximity_less_ambient detection. The
range of Scheme 1 proximity count is from -2 (n-1) to
2 (n-1) , Scheme 1 proximity detection is less affected by
the ambient IR noise variation.
TABLE 5. PROXIMITY SENSING SCHEME
2. Interrupt flag; Bit 2. This is the status bit of the interrupt.
The bit is set to logic high when the interrupt thresholds
have been triggered, and logic low when not yet triggered.
BIT 7
0
Reserved
OPERATION
Once triggered, INT pin stays low and the status bit stays
high. Both interrupt pin and the status bit are automatically
1
Sensing IR from LED with ambient IR rejection
cleared at the end of Command Register I transfer.
TABLE 3. INTERRUPT FLAG
2. Modulation Frequency: Bits 6. This bit sets the IR LED
driver ’s modulation frequency.
BIT 2
0
OPERATION
Interrupt is cleared or not triggered yet
TABLE 6. MODULATION FREQUENCY
MODULATION FREQUENCY
1
Interrupt is triggered
BITS 6
0
(kHz)
DC
3. Interrupt persist; Bits 1 and 0. The interrupt pin and the
interrupt flag is triggered/set when the data sensor
1
360
reading is out of the interrupt threshold window after m
consecutive number of integration cycles. The interrupt
persist bits determine m.
6
3. Amplitude of IR driver current: Bits 5 and 4. This device
provides current source to drive an external IR LED. The
drive capability can be programmed through Bits 5 and 4.
For example, the device sources 12.5mA out of the IRDR
pin if Bits 5 and 4 are 0.
FN6732.0
March 3, 2009
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