73S1210F-68IM/F Maxim Integrated Products, 73S1210F-68IM/F Datasheet - Page 51

• Manufacturer Part Number: 73S1210F-68IM/F
• Description: IC SMART CARD READER 68-QFN
• Manufacturer: Maxim Integrated Products

Specifications of 73S1210F-68IM/F

• Core Processor: 80515
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: I²C, SmartCard, UART/USART
• Peripherals: LED, POR, WDT
• Number Of I /o: 8
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

DS_1210F_001
1.7.10 Analog Voltage Comparator
The 73S1210F includes a programmable comparator that is connected to the ANA_IN pin. The
comparator can be configured to trigger an interrupt if the input voltage rises above or falls below a
selectable threshold voltage. The comparator control register should not be modified when the analog
interrupt (ANAIEN bit in the
generated when modifying the threshold. The comparator has a built-in hysteresis to prevent the
comparator from repeatedly responding to low-amplitude noise. This hysteresis is approximately 20mV.
Interrupt control is handled in the
Analog Compare Control Register (ACOMP): 0xFFD0  0x00
Rev. 1.4
ACOMP.7
ACOMP.6
ACOMP.5
ACOMP.4
ACOMP.3
ACOMP.2
ACOMP.1
ACOMP.0
Bit
MSB
ANALVL
ANALVL
ONCHG
Symbol
CMPEN
TSEL.2
TSEL.1
TSEL.0
CPOL
–
–
INT6Ctl
When read, indicates whether the input level is above or below the
threshold. This is a real time value and is not latched, so it may change
from the time of the interrupt trigger until read.
If set, the Ana_interrupt is invoked on any change above or below the
threshold, bit 4 is ignored.
If set = 1, Ana_interrupt is invoked when signal rises above selected
threshold. If set = 0, Ana_interrupt is invoked when signal goes below
selected threshold (default).
Enables power to the analog comparator. 1 = Enabled. 0 = Disabled
(default).
Sets the voltage threshold for comparison to the voltage on pin ANA_IN.
Thresholds are as follows:
TSEL.2
0
0
0
0
1
1
1
1
ONCHG
INT6Ctl
register) is enabled to guard against any false interrupt that might be
Table 54: The ACOMP Register
register.
TSEL.1
0
0
1
1
0
0
1
1
CPOL
CMPEN TSEL.2
TSEL.0
0
1
0
1
0
1
0
1
Function
1.00V
1.24V
1.40V
1.50V
1.75V
2.00V
2.30V
2.50V
Voltage Threshold
TSEL.1
73S1210F Data Sheet
TSEL.0
LSB
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