MCP23S17-E/SP Microchip Technology, MCP23S17-E/SP Datasheet - Page 9

• Manufacturer Part Number: MCP23S17-E/SP
• Description: IC I/O EXPANDER SPI 16B 28SDIP
• Manufacturer: Microchip Technology
• Type: I/O Expanderr

Specifications of MCP23S17-E/SP

• Package / Case: 28-DIP (0.300", 7.62mm)
• Interface: SPI
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 10MHz
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP23X17EV - BOARD EVAL FOR MCP23X17GPIODM-KPLCD - BOARD DEMO LCD GPIO EXP KEYPAD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1.5
The GPIO module is a general purpose, 16-bit wide,
bidirectional port that is functionally split into two 8-bit
wide ports.
The GPIO module contains the data ports (GPIOn),
internal pull-up resistors and the output latches
(OLATn).
TABLE 1-3:
TABLE 1-4:
© 2007 Microchip Technology Inc.
IODIRA
IPOLA
GPINTENA
GPPUA
GPIOA
OLATA
IODIRB
IPOLB
GPINTENB
GPPUB
GPIOB
OLATB
IODIRA
IODIRB
IPOLA
IPOLB
GPINTENA
GPINTENB
GPPUA
GPPUB
GPIOA
GPIOB
OLATA
OLATB
Register
Register
Name
Name
GPIO Port
Address
Address
(hex)
(hex)
0A
1A
0C
0D
00
01
02
06
09
10
11
12
16
19
00
01
02
03
04
05
12
13
14
15
SUMMARY OF REGISTERS ASSOCIATED WITH THE GPIO PORTS (BANK =
SUMMARY OF REGISTERS ASSOCIATED WITH THE GPIO PORTS (BANK =
GPINT7
GPINT7
GPINT7
GPINT7
bit 7
GP7
GP7
bit 7
GP7
GP7
PU7
OL7
PU7
OL7
PU7
PU7
OL7
OL7
IO7
IP7
IO7
IP7
IO7
IO7
IP7
IP7
GPINT6
GPINT6
GPINT6
GPINT6
bit 6
GP6
GP6
bit 6
GP6
GP6
PU6
OL6
PU6
OL6
PU6
PU6
OL6
OL6
IO6
IO6
IO6
IO6
IP6
IP6
IP6
IP6
GPINT5
GPINT5
GPINT5
GPINT5
bit 5
GP5
GP5
bit 5
GP5
GP5
PU5
OL5
PU5
OL5
PU5
PU5
OL5
OL5
IO5
IO5
IO5
IO5
IP5
IP5
IP5
IP5
GPINT4
GPINT4
GPINT4
GPINT4
bit 4
bit 4
PU4
GP4
OL4
PU4
GP4
OL4
PU4
PU4
GP4
GP4
OL4
OL4
IO4
IO4
IO4
IO4
IP4
IP4
IP4
IP4
MCP23017/MCP23S17
Reading the GPIOn register reads the value on the
port. Reading the OLATn register only reads the
latches, not the actual value on the port.
Writing to the GPIOn register actually causes a write to
the latches (OLATn). Writing to the OLATn register
forces the associated output drivers to drive to the level
in OLATn. Pins configured as inputs turn off the
associated output driver and put it in high-impedance.
GPINT3
GPINT3
GPINT3
GPINT3
bit 3
bit 3
PU3
GP3
OL3
PU3
GP3
OL3
PU3
PU3
GP3
GP3
OL3
OL3
IO3
IO3
IO3
IO3
IP3
IP3
IP3
IP3
GPINT2
GPINT2
GPINT2
GPINT2
bit 2
bit 2
PU2
GP2
PU2
GP2
OL2
PU2
PU2
GP2
GP2
OL2
OL2
OL2
IO2
IO2
IO2
IO2
IP2
IP2
IP2
IP2
GPINT1
GPINT1
GPINT1
GPINT1
bit 1
PU1
GP1
PU1
GP1
bit 1
PU1
PU1
GP1
GP1
OL1
OL1
OL1
OL1
IO1
IO1
IO1
IO1
IP1
IP1
IP1
IP1
GPINT0 0000 0000
GPINT0 0000 0000
GPINT0 0000 0000
GPINT0 0000 0000
bit 0
PU0
GP0
PU0
GP0
bit 0
PU0
PU0
GP0
GP0
OL0
OL0
OL0
OL0
IO0
IP0
IO0
IP0
IO0
IO0
IP0
IP0
DS21952B-page 9
1111 1111
0000 0000
0000 0000
0000 0000
0000 0000
1111 1111
0000 0000
0000 0000
0000 0000
0000 0000
1111 1111
1111 1111
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
POR/RST
POR/RST
1
0
value
value
)
)