LMH1982SQ National Semiconductor Corporation, LMH1982SQ Datasheet - Page 19

• Manufacturer Part Number: LMH1982SQ
• Manufacturer: National Semiconductor Corporation

The subsequent read data transfer shown in Figure 8 consists
of a start pulse, the slave device address including the read/
write bit (a one, indicating a read) and the ACK bit. The next
byte is the data read from the initial access address. Subse-
8.3 I
When the active low input I
will enable I
otherwise, the LMH1982 will not respond. For applications
with multiple LMH1982 devices on the same I
9.0 I
TABLE 10. I
Register
Address
0Ah
0Bh
0Ch
0Dh
0Eh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Fh
10h
11h
12h
13h
14h
2
2
C Enable Control Pin
C INTERFACE CONTROL REGISTER DEFINITIONS
Default
2
Data
C communication via its fixed slave address;
A3h
B4h
B4h
0Dh
0Dh
86h
00h
01h
06h
00h
00h
04h
01h
00h
06h
02h
02h
00h
00h
88h
88h
2
C Interface Control Register Map
GNLK_I
EN_TOF_
RSV
RSV
RSV
RSV
RSV
RST
RSV
D7
0
0
0
0
0
2
C_ENABLE = 0, the LMH1982
2
C
FIGURE 8. LMH1982 Read Sequence – Data Read Transfer
POL_TOF
GNLK
RSV
RSV
RSV
RSV
RSV
RSV
D6
0
0
0
0
0
ICP2 [7:4]
LOCK_CTRL [7:3]
2
C bus, the I
RSEL_I
TOF_INIT
TOF_CLK
TOF_HIZ
OVRD
PIN6_
RSV
RSV
RSV
RSV
D5
0
0
0
0
2
C
2
C
REF_27
HD_HIZ
RSEL
RSV
RSV
RSV
19
D4
0
0
0
TOF_OFFSET [7-0]
TOF_LPFM [7-0]
REF_LPFM [7-0]
TOF_RST [7:0]
TOF_PPL [7:0]
FB_DIV [7:0]
quent read data bytes will correspond to the next increment
address locations. Each data byte is separated from the other
data bytes by an ACK bit.
enable function can be useful for writing data to a specific
device(s) and for reading data from an individual device to
prevent bus contention. For single chip applications, the
I2C_ENABLE input can be tied to GND to keep the I
face enabled.
POL_HA
HOLD-
OVER
RSV
RSV
HD_FREQ [3:2]
D3
TOF_RST [12:8]
TOF_PPL [12:8]
FB_DIV [12:8]
HD_LOCK
POL_VA
ICP1 [4:0]
TOF_OFFSET [11:8]
RSV
RSV
D2
REF_LPFM [11:8]
TOF_LPFM [11:8
ICP4 [3:0]
ICP3 [3:0]
H_ERROR [2:0]
SD_LOCK
POL_HB
SD_HIZ
RSV
D1
REF_DIV [1:0]
REF_VALID
SD_FREQ
POL_VB
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RSV
D0
2
30052406
C inter-