HT46R71D-1 Holtek Semiconductor, HT46R71D-1 Datasheet - Page 22

• Manufacturer Part Number: HT46R71D-1
• Description: Dual Slope A/D Type MCU
• Manufacturer: Holtek Semiconductor

www.DataSheet4U.com
Note: V
The ADPWREN bit, defined in ADCR register, is used to
control the ADC module on/off function. The ADCCKEN
bit defined in the ADCR register is used to control the
chopper clock on/off function. When ADCCKEN is set to
quency defined by the ADCD registers. The ADC mod-
ule includes the OPA, buffer, integrator and comparator,
however the Bandgap voltage generator is independent
of this module. It will be automatically enabled when the
regulator is enabled, and also be disabled when the reg-
ulator is disabled. The application program should en-
able the related power to permit them to function and
disable them when idle to conserve power. The
charge/discharge control bits, ADDISCH1~ ADDISCH0,
are used to control the Dual slope circuit charging and
discharging behavior. The ADCMPO bit is read only for
the comparator output, while the ADINTM bits can set
the ADCMPO trigger mode for interrupt generation.
Rev. 1.00
1 it will enable the Chopper clock, with the clock fre-
INT
, V
CMP
signal can come from different R groups which are selected by software registers.
22
The following descriptions are based the fact that
ADRR0=0
The amplifier and buffer combination, form a differential
input pre-amplifier which amplifies the sensor input sig-
nal.
The combination of the Integrator, the comparator, the
resistor Rds, between DSRR and DSRC and the capaci-
tor Cds, between DSRC and DSCC form the main body
of the Dual slope ADC.
HT46R71D-1
May 14, 2007