MAX6957 MAXIM [Maxim Integrated Products], MAX6957 Datasheet - Page 14

• Manufacturer Part Number: MAX6957
• Description: 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
• Manufacturer: MAXIM [Maxim Integrated Products]

4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port LED Display Driver and I/O Expander
14
Figure 6. Maskable GPIO Ports P24 Through P31
______________________________________________________________________________________
P29
P26
P25
P30
P28
P27
P24
P31
GPIO/PORT OUTPUT LATCH
GPIO/PORT OUTPUT LATCH
GPIO/PORT OUTPUT LATCH
GPIO/PORT OUTPUT LATCH
GPIO/PORT OUTPUT LATCH
GPIO/PORT OUTPUT LATCH
GPIO/PORT OUTPUT LATCH
CONDITIONING
CONDITIONING
CONDITIONING
CONDITIONING
CONDITIONING
CONDITIONING
CONDITIONING
GPIO INPUT
GPIO INPUT
GPIO INPUT
GPIO INPUT
GPIO INPUT
GPIO INPUT
GPIO INPUT
CONTROL REGISTER M BIT = 1
CONDITIONING
GPIO INPUT
OUTPUT LATCH
OUTPUT LATCH
GPIO/PORT
IRQ
GPIO/PORT OUT
GPIO/PORT OUT
GPIO/PORT OUT
GPIO/PORT OUT
GPIO/PORT OUT
GPIO/PORT OUT
GPIO/PORT OUT
GPIO IN
GPIO IN
GPIO IN
GPIO IN
GPIO IN
GPIO IN
GPIO IN
R
S
CLOCK PULSE WHEN WRITING CONFIGURATION REGISTER WITH M BIT SET
D
D
D
D
D
D
D
Q
Q
Q
Q
Q
Q
Q
MASK REGISTER BIT 6
MASK REGISTER BIT 5
MASK REGISTER BIT 4
MASK REGISTER BIT 3
MASK REGISTER BIT 2
MASK REGISTER BIT 1
GPIO/PORT OUT
CLOCK PULSE AFTER EACH READ ACCESS TO MASK REGISTER
GPIO IN
IRQ STATUS STORED AS MSB OF MASK REGISTER
MASK REGISTER LSB
OR