PS700 datasheet(20/38 Pages) MICROCHIP

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PS700

DS21760F-page 20

 2004 Microchip Technology Inc.

4.4.11

A/D CONTROL REGISTERS

The eight A/D Control registers are defined as follows.

TABLE 4-3:

A/D CONTROL REGISTERS

The following register defines the bits contained in the eight A/D Control registers.

A/D CONTROL REGISTERS

A/D Reg. #

Name

Function

Location (HEX)

ADc0

Ictrl

Current measurement control

ADc1

ITctrl

Internal temperature measurement control

ADc2

ETctrl

External temperature measurement control

ADc3

VPctrl

Pack voltage measurement control

ADc4

VC1ctrl

VC1 voltage measurement control

ADc5

VC2ctrl

VC2 voltage measurement control

ADc6

OFFSctrl

Offset measurement control

ADc7

AUXctrl

Auxiliary measurement control

Enable

Resolution

Reference

Select

bit 7

bit 0

bit 7

Enable: A/D Measurement Enable bit

A ‘1’ in this bit enables the measurement defined by bits 0-6.

bit 6-4

Resolution: A/D Resolution Selection bits

These three bits control the resolution of the conversion performed for the corresponding A/D

Result register as follows:

Resolution = 0: 8-bit + sign conversion

Resolution = 1: 9-bit + sign conversion

Resolution = 2: 10-bit + sign conversion

Resolution = 3: 11-bit + sign conversion

Resolution = 4: 12-bit + sign conversion

Resolution = 5: 13-bit + sign conversion

Resolution = 6: 14-bit + sign conversion

Resolution = 7: 15-bit + sign conversion

bit 3

Reference: A/D Reference Selection bit

Reference = 0: VR = 170 mV

Reference = 1: VR = 340 mV

bit 2-0

Select: A/D Input Selection bits

Selects the analog mux input for the pending conversion as follows:

Select = 0: Current (SR pin voltage)

Select = 1: Internal temperature sensor

Select = 2: External temperature sensor (NTC pin voltage)

Select = 3: VPACK (pack voltage)

Select = 4: VC1 voltage

Select = 5: VC2 voltage

Select = 6: Offset voltage

Select = 7: Offset voltage

Legend:

‘1’ = Bit is set

‘0’ = Bit is cleared

R = Reserved bit

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