Rainbow Electronics MAX7315 - Manual (Page 14)

MAX7315
8-Port I/O Expander with LED Intensity
Control and Interrupt
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Table 3. Power-Up Configuration
REGISTER DATA
REGISTER FUNCTION POWER-UP CONDITION
ADDRESS
CODE
(HEX)
D7 D6 D5 D4 D3 D2 D1 D0
Blink phase 0 outputs P7–P0 High-impedance outputs 0x01 1 1 1 1 1 1 1 1
Ports configuration P7–P0 Ports P7–P0 are inputs 0x03 1 1 1 1 1 1 1 1
Blink phase 1 outputs P7–P0 High-impedance outputs 0x09 1 1 1 1 1 1 1 1
Master, O8 intensity
PWM oscillator is disabled;
O8 is static logic output
0x0E 0 0 0 0 1 1 1 1
Configuration
INT/O8 is interrupt output;
blink is disabled;
global intensity is enabled
0x0F 0 0 0 0 1 1 0 0
Outputs intensity P1, P0 P1, P0 are static logic outputs 0x10 1 1 1 1 1 1 1 1
Outputs Intensity P3, P2 P3, P2 are static logic outputs 0x11 1 1 1 1 1 1 1 1
Outputs intensity P5, P4 P5, P4 are static logic outputs 0x12 1 1 1 1 1 1 1 1
Outputs intensity P7, P6 P7, P6 are static logic outputs 0x13 1 1 1 1 1 1 1 1
Table 4. Configuration Register
REGISTER DATA
REGISTER
ADDRESS
CODE
(HEX)
D7 D6 D5 D4 D3 D2 D1 D0
CONFIGURATION
R/ W
INTERRUPT
STATUS
—
INTERRUPT
OUTPUT
CONTROL
AS GPO
INTERRUPT
ENABLE GLOBAL
INTENSITY BLINK FLIP
BLINK
ENABLE
Write device configuration 0 X
Read-back device configuration 1
INT
O
O1 O0 I G B E
Disable blink — X X X X X X X 0
Enable blink — X X X X X X X 1
— X X X X X X 0 1
Flip blink register (see text)
— X X X X X X 1 1
Disable global intensity control—intensity
is set by registers 0x10–0x13 for ports P0
through P7 when configured as outputs,
and by D3–D7 of register 0x0E for INT/O8
when INT/O8 pin is configured as an
output port
— X X X X X 0 X X
Enable global intensity control—intensity
for all ports configured as outputs is set
by D3–D0 of register 0x0E
—
0x0F
X X X X X 1 X X