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MAX7300ATL+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
MAX7300
2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
28-Port I/O Expander
______________________________________________________________________________________ 13
Table 5. Register Address Map
COMMAND ADDRESS
REGISTER
D15 D14 D13 D12 D11 D10 D9 D8
HEX
CODE
No-Op X 0 0 0 0 0 0 0 0x00
Configuration X 0 0 0 0 1 0 0 0x04
Transition Detect Mask X 0 0 0 0 1 1 0 0x06
Factory Reserved; do not write to this port X 0 0 0 0 1 1 1 0x07
Port Configuration P7, P6, P5, P4 X 0 0 0 1 0 0 1 0x09
Port Configuration P11, P10, P9, P8 X 0 0 0 1 0 1 0 0x0A
Port Configuration P15, P14, P13, P12 X 0 0 0 1 0 1 1 0x0B
Port Configuration P19, P18, P17, P16 X 0 0 0 1 1 0 0 0x0C
Port Configuration P23, P22, P21, P20 X 0 0 0 1 1 0 1 0x0D
Port Configuration P27, P26, P25, P24 X 0 0 0 1 1 1 0 0x0E
Port Configuration P31, P30, P29, P28 X 0 0 0 1 1 1 1 0x0F
Port 0 only (virtual port, no action) X 0 1 0 0 0 0 0 0x20
Port 1 only (virtual port, no action) X 0 1 0 0 0 0 1 0x21
Port 2 only (virtual port, no action) X 0 1 0 0 0 1 0 0x22
Port 3 only (virtual port, no action) X 0 1 0 0 0 1 1 0x23
Port 4 only (data bit D0. D7-D1 read as 0) X 0 1 0 0 1 0 0 0x24
Port 5 only (data bit D0. D7-D1 read as 0) X 0 1 0 0 1 0 1 0x25
Port 6 only (data bit D0. D7-D1 read as 0) X 0 1 0 0 1 1 0 0x26
Port 7 only (data bit D0. D7-D1 read as 0) X 0 1 0 0 1 1 1 0x27
Port 8 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 0 0 0 0x28
Port 9 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 0 0 1 0x29
Port 10 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 0 1 0 0x2A
Port 11 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 0 1 1 0x2B
Port 12 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 1 0 0 0x2C
Port 13 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 1 0 1 0x2D
Port 14 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 1 1 0 0x2E
Port 15 only (data bit D0. D7-D1 read as 0) X 0 1 0 1 1 1 1 0x2F
Port 16 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 0 0 0 0x30
Port 17 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 0 0 1 0x31
Port 18 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 0 1 0 0x32
Port 19 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 0 1 1 0x33
Port 20 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 1 0 0 0x34
Port 21 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 1 0 1 0x35
Port 22 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 1 1 0 0x36
Port 23 only (data bit D0. D7-D1 read as 0) X 0 1 1 0 1 1 1 0x37
Port 24 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 0 0 0 0x38
Port 25 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 0 0 1 0x39
MAX7300
2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
28-Port I/O Expander
14 ______________________________________________________________________________________
COMMAND ADDRESS
REGISTER
D15 D14 D13 D12 D11 D10 D9 D8
HEX
CODE
Port 26 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 0 1 0 0x3A
Port 27 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 0 1 1 0x3B
Port 28 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 1 0 0 0x3C
Port 29 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 1 0 1 0x3D
Port 30 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 1 1 0 0x3E
Port 31 only (data bit D0. D7-D1 read as 0) X 0 1 1 1 1 1 1 0x3F
4 ports 4–7 (data bits D0–D3. D4–D7 read as 0) X 1 0 0 0 0 0 0 0x40
5 ports 4–8 (data bits D0–D4. D5–D7 read as 0) X 1 0 0 0 0 0 1 0x41
6 ports 4–9 (data bits D0–D5. D6–D7 read as 0) X 1 0 0 0 0 1 0 0x42
7 ports 4–10 (data bits D0–D6. D7 reads as 0) X 1 0 0 0 0 1 1 0x43
8 ports 4–11 (data bits D0–D7) X 1 0 0 0 1 0 0 0x44
8 ports 5–12 (data bits D0–D7) X 1 0 0 0 1 0 1 0x45
8 ports 6–13 (data bits D0–D7) X 1 0 0 0 1 1 0 0x46
8 ports 7–14 (data bits D0–D7) X 1 0 0 0 1 1 1 0x47
8 ports 8–15 (data bits D0–D7) X 1 0 0 1 0 0 0 0x48
8 ports 9–16 (data bits D0–D7) X 1 0 0 1 0 0 1 0x49
8 ports 10–17 (data bits D0–D7) X 1 0 0 1 0 1 0 0x4A
8 ports 11–18 (data bits D0–D7) X 1 0 0 1 0 1 1 0x4B
8 ports 12–19 (data bits D0–D7) X 1 0 0 1 1 0 0 0x4C
8 ports 13–20 (data bits D0–D7) X 1 0 0 1 1 0 1 0x4D
8 ports 14–21 (data bits D0–D7) X 1 0 0 1 1 1 0 0x4E
8 ports 15–22 (data bits D0–D7) X 1 0 0 1 1 1 1 0x4F
8 ports 16–23 (data bits D0–D7) X 1 0 1 0 0 0 0 0x50
8 ports 17–24 (data bits D0–D7) X 1 0 1 0 0 0 1 0x51
8 ports 18–25 (data bits D0–D7) X 1 0 1 0 0 1 0 0x52
8 ports 19–26 (data bits D0–D7) X 1 0 1 0 0 1 1 0x53
8 ports 20–27 (data bits D0–D7) X 1 0 1 0 1 0 0 0x54
8 ports 21–28 (data bits D0–D7) X 1 0 1 0 1 0 1 0x55
8 ports 22–29 (data bits D0–D7) X 1 0 1 0 1 1 0 0x56
8 ports 23–30 (data bits D0–D7) X 1 0 1 0 1 1 1 0x57
8 ports 24–31 (data bits D0–D7) X 1 0 1 1 0 0 0 0x58
7 ports 25–31 (data bits D0–D6. D7 reads as 0) X 1 0 1 1 0 0 1 0x59
6 ports 26–31 (data bits D0–D5. D6–D7 read as 0) X 1 0 1 1 0 1 0 0x5A
5 ports 27–31 (data bits D0–D4. D5–D7 read as 0) X 1 0 1 1 0 1 1 0x5B
4 ports 28–31 (data bits D0–D3. D4–D7 read as 0) X 1 0 1 1 1 0 0 0x5C
3 ports 29–31 (data bits D0–D2. D3–D7 read as 0) X 1 0 1 1 1 0 1 0x5D
2 ports 30–31 (data bits D0–D1. D2–D7 read as 0) X 1 0 1 1 1 1 0 0x5E
1 port 31 only (data bits D0. D1–D7 read as 0) X 1 0 1 1 1 1 1 0x5F
Table 5. Register Address Map (continued)
Note: Unused bits read as zero.
MAX7300
2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
28-Port I/O Expander
______________________________________________________________________________________ 15
Table 6. Power-Up Configuration
REGISTER DATA
REGISTER
FUNCTION
POWER-UP CONDITION
ADDRESS
CODE
(HEX)
D7 D6 D5 D4 D3 D2 D1 D0
Port Register
Bits 4 to 31
GPIO Output Low
0x24 to
0x3F
XXXXXXX0
Configuration
Register
Shutdown Enabled
Transition Detection Disabled
0x04 0 0 X X X X X 0
Input Mask
Register
All Clear (Masked Off) 0x06 X 0 0 0 0 0 0 0
Port
Configuration
P7, P6, P5, P4: GPIO Inputs without Pullup 0x09 1 0 1 0 1 0 1 0
Port
Configuration
P11, P10, P9, P8: GPIO Inputs without Pullup 0x0A 1 0 1 0 1 0 1 0
Port
Configuration
P15, P14, P13, P12: GPIO Inputs without Pullup 0x0B 1 0 1 0 1 0 1 0
Port
Configuration
P19, P18, P17, P16: GPIO Inputs without Pullup 0x0C 1 0 1 0 1 0 1 0
Port
Configuration
P23, P22, P21, P20: GPIO Inputs without Pullup 0x0D 1 0 1 0 1 0 1 0
Port
Configuration
P27, P26, P25, P24: GPIO Inputs without Pullup 0x0E 1 0 1 0 1 0 1 0
Port
Configuration
P31, P30, P29, P28: GPIO Inputs without Pullup 0x0F 1 0 1 0 1 0 1 0
X = unused bits; if read, zero results.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX7300ATL+

Mfr. #:
Buy MAX7300ATL+
Manufacturer:
Maxim Integrated
Description:
Interface - I/O Expanders 2.5-5.5V 20/28 Port I/O Expander
Lifecycle:
New from this manufacturer.
Delivery:
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