MCP4132T-502E/MF 查看數據表（PDF） - Microchip Technology

零件编号

产品描述 (功能)

生产厂家

MCP4132T-502E/MF

7/8-Bit Single/Dual SPI Digital POT with Volatile Memory

Microchip Technology 

MCP413X/415X/423X/425X

7.5 Write Data

Normal and High Voltage

Note:

The High Voltage Write Data command is

supported for compatability with system

that also support MCP414X/416X/424X/

426X devices.

The Write command is a 16-bit command. The format

of the command is shown in Figure 7-2.

A Write command to a Volatile memory location

changes that location after a properly formatted Write

Command (16-clock) have been received.

7.5.1 SINGLE WRITE

The write operation requires that the CS pin be in the

active state (VILor VIHH). Typically, the CS pin will be in

the inactive state (VIH) and is driven to the active state

(VIL). The 16-bit Write Command (Command Byte and

Data Byte) is then clocked in on the SCK and SDI pins.

Once all 16 bits have been received, the specified

volatile address is updated. A write will not occur if the

write command isn’t exactly 16 clocks pulses. This

protects against system issues from corrupting the

memory locations.

Figure 6-3 and Figure 6-4 show possible waveforms

for a single write.

COMMAND BYTE

DATA BYTE

AAAA 0 0DDDDDDDDDD

SDI D D D D

9876543210

3210

SDO 1

1

1

1

1

1

1

1

1

1

1

1

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1 Valid Address/Command combination

0 Invalid Address/Command combination (1)

Note 1: If an Error Condition occurs (CMDERR = L), all following SDO bits will be low until the CMDERR

condition is cleared (the CS pin is forced to the inactive state).

FIGURE 7-2:

Write Command - SDI and SDO States.

© 2008 Microchip Technology Inc.

DS22060B-page 51

Share Link: