MAX7360 Maxim, MAX7360 Datasheet - Page 19

• Manufacturer Part Number: MAX7360
• Description: The MAX7360 I²C-interfaced peripheral provides microprocessors with management of up to 64 key switches, with an additional eight LED drivers/GPIOs that feature constant-current, PWM intensity control, and rotary switch control options
• Manufacturer: Maxim

Table 7. Keys FIFO Register Format (0x00)
The key number indicated by D5:D0 is a key
event. D7 is always for a key press of key 62
and key 63. When D7 is 0, the key read is the
last data in the FIFO. When D7 is 1, there is
more data in the FIFO. When D6 is 1, key data
read from FIFO is a key release. When D6 is 0,
key data read from FIFO is a key press.
FIFO is empty.
FIFO is overflow. Continue to read data in FIFO
Key 63 is pressed. Read one more time to
determine whether there is more data in FIFO.
Key 63 is released. Read one more time to
determine whether there is more data in FIFO.
Key repeat. Indicates the last data in FIFO.
Key repeat. Indicates more data in FIFO.
Key 62 is pressed. Read one more time to
determine whether there is more data in FIFO.
Key 62 is released. Read one more time to
determine whether there is more data in FIFO.
I
2
Driver/GPIOs with Integrated ESD Protection
C-Interfaced Key-Switch Controller and LED
SPECIAL FUNCTION
______________________________________________________________________________________
empty
FIFO
flag
D7
0
0
1
1
0
0
1
1
release
Key
flag
D6
0
1
0
1
0
1
0
1
D5
X
1
1
1
1
1
1
1
1
KEYS FIFO REGISTER DATA
D4
X
1
1
1
1
1
1
1
1
D3
X
1
1
1
1
1
1
1
1
Register Tables
D2
X
1
1
1
1
1
1
1
1
D1
X
1
1
1
1
1
1
1
1
D0
X
1
1
1
1
0
0
0
0
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