Datasheet

MAX7314
18-Port GPIO with LED Intensity Control,
Interrupt, and Hot-Insertion Protection
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Table 4. Configuration Register
REGISTER DATA
REGISTER
ADDRESS
CODE
(hex)
D7 D6 D5 D4 D3 D2 D1 D0
CONFIGURATION
R/W
0x0F
INTERRUPT
STATUS
BLINK
STATUS
INTERRUPT
OUTPUT
CONTROL
AS GPO
INTERRUPT
ENABLE
GLOBAL
INTENSITY
BLINK FLIP
BLINK
ENABLE
Write device configuration
0
Read back device configuration
1
INT BLINK O1
O0 I G B E
Disable blink
—
XXXXXXX0
Enable blink
—
XXXXXXX1
—
XXXXXX01
Flip blink register (see text)
—
XXXXXX11
Disable global intensity control—intensity
is set by registers 0x10–0x17 for ports P0
through P15 when configured as outputs,
and by D3–D0 of register 0x0E for
INT/O16 when INT/O16 pin is configured
as an output port
—
XXXXX0 XX
Enable global intensity control—intensity
for all ports configured as outputs is set
by D3–D0 of register 0x0E
—
XXXXX1 XX
Disable data change interrupt—INT/O16
output is controlled by the O0 and O1 bits
—
XXXX0 XXX
Enable data change interrupt—INT/O16
output is controlled by port input data
change
—
XXXX1 XXX
INT/O16 output is low (blink is disabled)
—
XXX00XX0
INT/O16 output is high impedance (blink
is disabled)
—
XXX10XX0
INT/O16 outp ut i s l ow d ur i ng b l i nk p hase 0
—
XXX00XX1
INT/O16 output is high impedance during
blink phase 0
—
XXX10XX1
INT/O16 outp ut i s l ow d ur i ng b l i nk p hase 1
—
XX0 X 0 XX1
INT/O16 output is high impedance during
blink phase 1
—
XX1 X 0 XX1
X = Don’t care.