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| 型号： | P89CE558 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | Single-chip 8-bit microcontroller(8位单片微控制器) |
| 中文描述： | 单芯片8位微控制器（8位单片微控制器） |
| 文件页数： | 18/72页 |
| 文件大小： | 721K |
| 代理商： | P89CE558 |
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Philips Semiconductors
Preliminary specification
P83CE558/P80CE558/P89CE558
Single-chip 8-bit microcontroller
1996 Aug 06
18
Figure 15. Functional diagram of AD converter.
+
–
8
8
8
8
2
2
10
10
10
COMPARATOR
SAR
DAC
8x
10–bit result
registers
SCAN LOGIC
ADPSS
ADCON
2 LATCHES
Read
ADRSH
Read
ADRSL
n
ANALOG
Mux.
ADC0
ADC7
AV
ref+
AV
ref–
AV
DD1
AV
SS1
ADEXS
INTERNAL BUS
Table 10.
Description of ADCON bits
SYMBOL
BIT
FUNCTION
ADCON.7
ADPR1
Control bit for the prescaler.
ADCON.6
ADPR0
Control bit for the prescaler.
ADPR1=0 ADPR0=0 Prescaler divides by 2 (default by reset)
ADPR1=0 ADPR0=1 Prescaler divides by 4
ADPR1=1 ADPR0=0 Prescaler divides by 6
ADPR1=1 ADPR0=1 Prescaler divides by 8
ADCON.5
ADPOS
ADPOS is reserved for future use. Must be ’0’ if ADCON is written.
ADCON.4
ADINT
ADC interrupt flag. This flag is set when all selected analog inputs are converted, as well in continuous
scan as in one-time scan mode. An interrupt is invoked if this interrupt is enabled. ADINT must be cleared
by software. It cannot be set by software.
ADCON.3
ADSST
ADC start and status. Setting this bit by software or by hardware (via ADEXS input) starts the A/D
conversion of the selected analog inputs. ADSST stays a ‘one’ in continuous scan mode. In one-time scan
mode, ADSST is cleared by hardware when the last selected analog input channel has been converted. As
long as ADSST is ’1’, new start commands to the ADC-block are ignored.
An A/D conversion in progress is aborted if ADSST is cleared by software.
ADCON.2
ADCSA
1
0
=
=
Continuous scan of the selected analog inputs after a start of an A/D conversion.
One-time scan of the selected analog inputs after a start of an A/D conversion.
ADCON.1
ADSRE
1
0
=
=
A rising edge at input ADEXS will start the A/D conversion and generate a capture signal.
A rising edge at input ADEXS has no effect.
ADCON.0
ADSFE
1
0
=
=
A falling edge at input ADEXS will start the A/D conversion and generate a capture signal.
A falling edge at input ADEXS has no effect.
相关PDF资料 |
PDF描述 |
|---|---|
| P83CE558 | Single-chip 8-bit microcontroller |
| P89CE558EBB | Single-chip 8-bit microcontroller |
| P89CE558EFB | Single-chip 8-bit microcontroller |
| P80CE558 | Single-chip 8-bit microcontroller(8位单片微控制器) |
| P80CE558EBB | Single-chip 8-bit microcontroller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| P89CE558EBB | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller |
| P89CE558EFB | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller |
| P89CV51RB2 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 64 kB flash microcontroller with 1 kB RAM, SPI, 6-clock CPU with 6/12-clock peripherals |
| P89CV51RB2_09 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 64 kB flash microcontroller with 1 kB RAM, SPI, 6-clock CPU with 6/12-clock peripherals |
| P89CV51RB2BBC,557 | 制造商:NXP Semiconductors 功能描述: |
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