Datasheet

MCP413X/415X/423X/425X
DS22060B-page 34 © 2008 Microchip Technology Inc.
4.2.1.1 Status (STATUS) Register
This register contains 5 status bits. These bits show the
state of the Shutdown bit. The STATUS register can be
accessed via the READ commands. Register 4-1
describes each STATUS register bit.
The STATUS register is placed at Address 05h.
REGISTER 4-1: STATUS REGISTER
R-1 R-1 R-1 R-1 R-0 R-x R-x R-x R-x
D8:D5 RESV RESV RESV SHDN RESV
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 8-5 D8:D5: Reserved. Forced to “1”
bit 4-2 RESV: Reserved
bit 1 SHDN: Hardware Shutdown pin Status bit (Refer to Section 5.3 “Shutdown” for further information)
This bit indicates if the Hardware shutdown pin (SHDN
) is low. A hardware shutdown disconnects the
Terminal A and forces the wiper (Terminal W) to Terminal B (see Figure 5-2). While the device is in Hard-
ware Shutdown (the SHDN
pin is low) the serial interface is operational so the STATUS register may be
read.
1 = MCP4XXX is in the Hardware Shutdown state
0 = MCP4XXX is NOT in the Hardware Shutdown state
bit 0 RESV: Reserved