MCP19124 datasheet(57/236 Pages) MICROCHIP

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 2016 Microchip Technology Inc.

DS20005619A-page 57

MCP19124/5

8.0

SYSTEM BENCH TESTING

To allow for easier system design and bench testing,

the MCP19124/5 feature a multiplexer used to output

various internal analog signals. These signals can be

measured on the GPA0 pin through a unity gain buffer.

The configuration control of the GPA0 pin is found in

the ABECON register.

Control of the signals present at the output of the unity

gain analog buffer is found in the ADCON0 register.

ADCON0: ANALOG-TO-DIGITAL CONTROL REGISTER

U-0

R/W-0

—

CHS4

CHS3

CHS2

CHS1

CHS0

GO/DONE

ADON

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

u = Bit is unchanged

x = Bit is unknown

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

bit 7

Unimplemented: Read as ‘0’

bit 6-2

CHS<4:0>: Analog Channel Select bits

00000

= VIN/n analog voltage measurement (VIN/15.5328)

00001

= VREF + VZC (DAC reference voltage + VZC pedestal setting current regulation level)

00010

= OVREF (reference for overvoltage comparator)

00011

= VBGR (band gap reference)

00100

= VS (voltage proportional to VOUT)

00101

= EA_SC (error amplifier after slope compensation output)

00110

= A2 (secondary current sense amplifier output at RFB_INT connection)

00111

= Pedestal (Pedestal Voltage)

01000

= Reserved

01001

= Reserved

01010

= IP_ADJ (IP after Pedestal and Offset Adjust (at PWM Comparator))

01011

= IP_OFF_REF (IP Offset Reference)

01100

= VDR/n (VDR/n analog driver voltage measurement = 0.229V/V x VDR)

01101

= TEMP_SNS (analog voltage representing internal temperature)

01110

= DLL_VCON (Delay Locked Loop Voltage Reference - control voltage for dead time)

01111

= SLPCMP_REF (slope compensation reference)

10000

= EAOR (OR’d output node from the two error amplifiers EA1 & EA2)

10001

= Unimplemented

10010

= Unimplemented

10011

= Unimplemented

10100

= Unimplemented

10101

= Unimplemented

10110

= Unimplemented

10111

= Unimplemented

11000

= GPA0/AN0 (i.e. ADDR1)

11001

= GPA1/AN1 (i.e. ADDR0)

11010

= GPA2/AN2 (i.e. Temperature Sensor Input)

11011

= GPA3/AN3 (i.e. BIN)

11100

= GPB1/AN4

11101

= GPB4/AN5 (MCP19125 Only)

11110

= GPB5/AN6 (MCP19125 Only)

11111

= GPB6/AN7 (MCP19125 Only)

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