參數(shù)資料
型號: PSOC
廠商: Cypress Semiconductor Corp.
英文描述: 8-Bit Programmable System-on-Chip (PSoC⑩) Microcontrollers
中文描述: 8位可編程系統(tǒng)(的PSoC⑩)微控制器片上
文件頁數(shù): 89/148頁
文件大?。?/td> 1412K
代理商: PSOC
Analog PSoC Blocks
September 5, 2002
Document #: 38-12010 CY Rev. ** CMS Rev. 3.20
89
10.9.3.3
Analog Switch Cap Type A Block xx Control 2 Register
AnalogBus gates the output to the analog column bus.
The output on the analog column bus is affected by the
state of the ClockPhase bit in Control 0 Register
(ASA10CR0, ASA12CR0, ASA21CR0, ASA23CR0). If
AnalogBus is set to 0, the output to the analog column
bus is tri-stated. If AnalogBus is set to 1, the signal that is
output to the analog column bus is selected by the
ClockPhase bit. If the ClockPhase bit is 0, the block out-
put is gated by sampling clock on last part of PHI2. If the
ClockPhase bit is 1, the block output continuously drives
the analog column bus.
CompBus controls the output to the column comparator
bus. Note that if the comparator bus is not driven by any-
thing in the column, it is pulled low. The comparator out-
put is evaluated on the rising edge of internal PHI1 and
is latched so it is available during internal PHI2.
AutoZero controls the shorting of the output to the invert-
ing input of the op-amp. When shorted, the op-amp is
basically a follower. The output is the op-amp offset. By
using the feedback capacitor of the integrator, the block
can memorize the offset and create an offset cancella-
tion scheme. AutoZero also controls a pair of switches
between the A and B branches and the summing node of
the op-amp. If AutoZero is enabled, then the pair of
switches is active. AutoZero also affects the function of
the FSW1 bit in Control 3 Register.
The CCap bits set the value of the capacitor in the C
path.
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