MCP23X17EV Microchip Technology, MCP23X17EV Datasheet - Page 6

• Manufacturer Part Number: MCP23X17EV
• Description: BOARD EVAL FOR MCP23X17
• Manufacturer: Microchip Technology

Specifications of MCP23X17EV

• Main Purpose: Interface, GPIO Expander
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP23017, MCP23S17
• Primary Attributes: (2) 16-Bit GPIO Expanders, I2C and SPI
• Secondary Attributes: 4 Momentary Switches, 12 LEDs
• Processor To Be Evaluated: MCP23x17
• Data Bus Width: 16 bit
• Interface Type: SPI
• Silicon Manufacturer: Microchip
• Silicon Core Number: MCP23017, MCP23S17
• Kit Application Type: Interface
• Application Sub Type: GPIO Expander
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

AN1043
FIGURE 6:
FIGURE 7:
DS01043A-page 6
S
S
GPIOA
OLATA
IODIRB
IPOLB
GPINTENB
DEFVALB
INTCONB
IOCON
GPPUB
INTFB
INTCAPB
GPIOB
OLATB
INTCONB
IOCON
IOCON
GPPUA
GPPUB
INTFA
INTFB
INTCAPA
INTCAPB
GPIOA
GPIOB
OLATA
OLATB
0 1 0 0 a
0 1 0 0 a
MCP23X08
MCP23X17
Opcode
Opcode
a
a
8-BIT MODE: ADDRESS POINTER ENABLED (MCP23008 EXAMPLE)
16-BIT MODE: ADDRESS POINTER DISABLED (MCP23017 EXAMPLE)
a
a
0 A
0 A
0A
1A
09
10
11
12
13
14
15
16
17
18
19
0A
0B
0C
0D
0E
09
0F
10
11
12
13
14
15
0 0 0 0 1
0 0 0 1 0
Addr = 09h
Addr = 12h
Register
Register
from 0Ah to 10h when transitioning
Note: The address pointer jumps
0
0
1
1
from Port A to Port B
0 A 1 0 1 0 1
0 A 1 0 1 0 1
When the address pointer is
16-bit mode, the address pointer will alternate between the
register pair. Also, the initial address can be either register
address (e.g., 14h or 15h) and the pointer will still alternate
between the registers.
When the address pointer is
8-bit mode, the address pointer will increment after every
byte is clocked. The address pointer will roll over to 00h
after exceeding 1Ah (which is the last location of Port B).
Data @
Data @
09h
12h
0
0
1
1
0 A 0 1 0 1 0
0 A 0 1 0 1 0
Data @
Data @
DISABLED
ENABLED
0Ah
13h
1
1
0
0
© 2006 Microchip Technology Inc.
1 A 1 0 1 0 1
1 A 1 0 1 0 1
and the device is in
and the device is in
Data @
Data @
10h
12h
0
0
1
1
0 P
0 P