P80C592 Philips Semiconductors, P80C592 Datasheet - Page 19

• Manufacturer Part Number: P80C592
• Description: 8-bit microcontroller with on-chip CAN
• Manufacturer: Philips Semiconductors

Philips Semiconductors
10.1
Table 13 ADC Control register (address C5H)
Table 14 Description of the ADCON bits
Table 15 ADCI and ADCS operating modes
If ADCI is cleared by software while ADCS is set at the same time a new analog-to-digital conversion with the same
channel-number may be started. It is recommended to reset ADCI before ADCS is set.
Note
1. Start of a new conversion requires ADCI = 0.
1996 Jun 27
BIT SYMBOL
7
6
5
4
3
2
1
0
8-bit microcontroller with on-chip CAN
ADC.1
7
ADC Control register (ADCON)
AADR2
AADR1
AADR0
ADC.1
ADC.0
ADEX
ADCS
ADCI
ADCI
0
0
1
Bit 1 of ADC converted value.
Bit 0 of ADC converted value.
Enable external start of conversion by STADC. If ADEX is:
ADC interrupt flag. This flag is set when an analog-to-digital conversion result is ready to be read.
If enabled, an interrupt is invoked. The flag must be cleared by software.
It cannot be set by software (see Table 15).
ADC start and status. Setting this bit starts an analog-to-digital conversion. It may be set by
software or by the external signal STADC. The ADC logic ensures that this signal is HIGH while the
ADC is busy. On completion of the conversion, ADCS is reset at the same time the interrupt flag
ADCI is set. ADCS can not be reset by software (see Table 15).
Analog input select. This binary coded address selects one of the eight analog port pins of P5 to be
input to the converter. It can only be changed when ADCI and ADCS are both LOW. AADR2 is the
MSB. (e.g. 100B selects the analog input channel ADC4)
ADC.0
LOW, then conversion cannot be started externally by STADC (only by software by setting ADCS)
HIGH, then conversion can be started externally by a rising edge on STADC or externally.
6
ADEX
X (don’t care)
5
ADCS
0
1
ADCI
4
ADC not busy, a conversion can be started.
ADC busy, start of a new conversion is blocked.
Conversion completed; see note 1.
19
FUNCTION
ADCS
3
AADR2
2
OPERATION
AADR1
1
Product specification
P8xC592
AADR0
0