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参数资料
| 型号： | MAX7301AAX+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/17页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER SPI 28B 36SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 30 |
| 接口： | SPI/QSPI?/MICROWIRE? |
| 输入/输出数： | 28 |
| 中断输出： | 是 |
| 频率 - 时钟： | 26MHz |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 1424 (CN2011-ZH PDF) |
MAX7301
Serial Interface
The MAX7301 communicates through an SPI-compati-
ble 4-wire serial interface. The interface has three
inputs, Clock (SCLK), Chip Select (
CS), and Data In
(DIN), and one output, Data Out (DOUT).
CS must be
low to clock data into or out of the device, and DIN
must be stable when sampled on the rising edge of
SCLK. DOUT provides a copy of the bit that was input
15.5 clocks earlier, or upon a query it outputs internal
register data, and is stable on the rising edge of SCLK.
Note that the SPI protocol expects DOUT to be high
impedance when the MAX7301 is not being
accessed; DOUT on the MAX7301 is never high
impedance. See www.maxim-ic.com/an 1879 for
ways to convert DOUT to tri-state, if required.
SCLK and DIN may be used to transmit data to other
peripherals, so the MAX7301 ignores all activity on
SCLK and DIN except between the fall and subsequent
rise of
CS.
Control and Operation Using the
4-Wire Interface
Controlling the MAX7301 requires sending a 16-bit
word. The first byte, D15 through D8, is the command
address (Table 3), and the second byte, D7 through
D0, is the data byte (Table 4 through Table 8).
Connecting Multiple MAX7301s
to the 4-Wire Bus
Multiple MAX7301s may be daisy-chained by connect-
ing the DOUT of one device to the DIN of the next, and
driving SCLK and
CS lines in parallel (Figure 3). Data at
DIN propagates through the internal shift registers and
appears at DOUT 15.5 clock cycles later, clocked out
on the falling edge of SCLK. When sending commands
to multiple MAX7301s, all devices are accessed at the
same time. An access requires (16 n) clock cycles,
where n is the number of MAX7301s connected togeth-
er. To update just one device in a daisy-chain, the user
can send the No-Op command (0x00) to the others.
Writing Device Registers
The MAX7301 contains a 16-bit shift register into which
DIN data are clocked on the rising edge of SCLK, when
CS is low. When CS is high, transitions on SCLK have
no effect. When
CS goes high, the 16 bits in the Shift
register are parallel loaded into a 16-bit latch. The 16
bits in the latch are then decoded and executed.
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
6
_______________________________________________________________________________________
Table 1. Port Configuration Map
REGISTER DATA
REGISTER
ADDRESS
CODE (HEX)
D7
D6
D5
D4
D3
D2
D1
D0
Port Configuration for P7, P6, P5, P4
0x09
P7
P6
P5
P4
Port Configuration for P11, P10, P9, P8
0x0A
P11
P10
P9
P8
Port Configuration for P15, P14, P13, P12
0x0B
P15
P14
P13
P12
Port Configuration for P19, P18, P17, P16
0x0C
P19
P18
P17
P16
Port Configuration for P23, P22, P21, P20
0x0D
P23
P22
P21
P20
Port Configuration for P27, P26, P25, P24
0x0E
P27
P26
P25
P24
Port Configuration for P31, P30, P29, P28
0x0F
P31
P30
P29
P28
Table 2. Port Configuration Matrix
PORT
CONFIGURATION
BIT PAIR
MODE
FUNCTION
PORT
REGISTER
(0x20–0x5F)
(0xA0–0xDF)
PIN BEHAVIOR
ADDRESS
CODE (HEX)
UPPER
LOWER
DO NOT USE THIS SETTING
0x09 to 0x0F
00
Register bit = 0
Active-low logic output
Output
GPIO Output
Register bit = 1
Active-high logic output
0x09 to 0x0F
01
Input
GPIO Input
Without Pullup
Schmitt logic input
0x09 to 0x0F
10
Input
GPIO Input with Pullup
Register bit =
input logic level
Schmitt logic input with pullup
0x09 to 0x0F
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7301AAX+ | 功能描述:接口-I/O扩展器 2.5-5.5V 20/28 Port I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MAX7301AAX+T | 功能描述:接口-I/O扩展器 2.5-5.5V 20/28 Port I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MAX7301AAXT | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander |
| MAX7301AAX-T | 功能描述:接口-I/O扩展器 2.5-5.5V 20/28 Port I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MAX7301AGL | 制造商:Maxim Integrated Products 功能描述:3-WIRE-INTERFACED, 2.5V TO 5.5V, 20-PORT AND - Bulk |
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