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參數(shù)資料
| 型號(hào)： | PCE84C882 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Microcontroller for monitor OSD and auto-sync applications(監(jiān)視器屏幕顯示和自動(dòng)同步應(yīng)用的微控制器) |
| 中文描述： | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PDIP42 |
| 封裝： | 0.600 INCH, PLASTIC, SDIP-42 |
| 文件頁數(shù)： | 16/60頁 |
| 文件大?。?/td> | 409K |
| 代理商： | PCE84C882 |
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1996 Jan 08
16
Philips Semiconductors
Preliminary specification
Microcontroller for monitor OSD
and auto-sync applications
PCE84C882
9.
The operations detailed in 6, 7 and 8 above are
repeated and each time the digital input to the DAC is
changed accordingly; as dictated by the state of the
COMP bit. The complete process is shown in Fig.13.
Each time the DAC input is changed the number of
values which the analog input can take is reduced by
half. In this manner the actual analog value is honed
into. The value of the analog input (V
A
) is determined
using Equation (4):
(4)
As the conversion time of each compare operation is
greater than 6
μ
s but less than 9
μ
s; a NOP instruction is
recommended to be used in between the instructions that
change the value of V
ref
; select the ADC channel and read
the COMP bit.
V
A
V
16
----------
DAC value
1
+
(
)
×
=
Fig.12 Block diagram of 1 channel ADC.
handbook, full pagewidth
4-BIT DAC
COMPARATOR
EN
DAC3
DAC2
DAC1
DAC0
ADCE2
ADCS1
ADCS0
MGC712
ADC enable selection
DAC value selection
ENABLE
SELECTOR
ADC
CHANNEL
SELECTOR
DP12/ADC2
Vref
DERIVATIVE PORT
SELECTOR
EN2
‘MOV A, D20’
instruction
to read COMP bit
COMP bit
Internal bus
Channel selection
+
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