MAX6964_05 Datasheet, PDF (9/23 Pages) Maxim Integrated Products – 17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection

17-Output LED Driver/GPO with
Intensity Control and Hot-Insertion Protection
COMMAND BYTE IS STORED ON RECEIPT OF
STOP CONDITION
ACKNOWLEDGE FROM MAX6964
D15 D14 D13 D12 D11 D10 D9 D8
S
SLAVE ADDRESS
0A
COMMAND BYTE
AP
R/W
ACKNOWLEDGE FROM MAX6964
Figure 7. Command Byte Received
HOW COMMAND BYTE AND DATA BYTE MAP INTO
MAX6964's REGISTERS
ACKNOWLEDGE FROM MAX6964
ACKNOWLEDGE FROM MAX6964
D15 D14 D13 D12 D11 D10 D9 D8
ACKNOWLEDGE FROM MAX6964
D7 D6 D5 D4 D3 D2 D1 D0
S
SLAVE ADDRESS
0A
COMMAND BYTE
A
DATA BYTE
AP
1
R/W
BYTE
AUTOINCREMENT MEMORY ADDRESS
Figure 8. Command and Single Data Byte Received
HOW COMMAND BYTE AND DATA BYTE MAP INTO
MAX6964's REGISTERS
ACKNOWLEDGE FROM MAX6964
ACKNOWLEDGE FROM MAX6964
D15 D14 D13 D12 D11 D10 D9 D8
ACKNOWLEDGE FROM MAX6964
D7 D6 D5 D4 D3 D2 D1 D0
S
SLAVE ADDRESS
0A
COMMAND BYTE
A
DATA BYTE
AP
N
R/W
BYTE
AUTOINCREMENT MEMORY ADDRESS
Figure 9. n Data Bytes Received
WRITE TO OUTPUT PORTS REGISTERS (BLINK PHASE 0 REGISTERS/BLINK PHASE 1 REGISTERS)
SCL 1 2 3 4 5 6 7 8 9
SLAVE ADDRESS
COMMAND BYTE
SDA S A6 A5 A4 A3 A2 A1 A0 0 A 0 0 0 0 0 0 0 1 A MSB
DATA1
LSB A MSB
DATA2
LSB A P
START CONDITION
O7–O0
O15– O8
R/W ACKNOWLEDGE FROM SLAVE
ACKNOWLEDGE FROM SLAVE
ACKNOWLEDGE FROM SLAVE
DATA1 VALID
t_DV
t_DV
STOP
CONDITION
DATA2 VALID
Figure 10. Write Timing Diagram
If multiple data bytes are transmitted before a STOP con-
dition is detected, these bytes are generally stored in
subsequent MAX6964 internal registers because the
command byte address autoincrements (Table 2). A
diagram of a write to the output ports registers (blink
phase 0 registers or blink phase 1 registers) is given in
Figure 10.
Message Format for Reading
The MAX6964 is read using the MAX6964’s internally
stored command byte as an address pointer the same
way the stored command byte is used as an address
pointer for a write. The pointer autoincrements after
each data byte is read using the same rules as for a
write (Table 2). Thus, a read is initiated by first configur-
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