CY8C26643-24PI Cypress Semiconductor Corp, CY8C26643-24PI Datasheet - Page 110

• Manufacturer Part Number: CY8C26643-24PI
• Description: IC MCU 16K FLASH 256B 48-DIP
• Manufacturer: Cypress Semiconductor Corp
• Series: PSOC™ CY8C26xxxr

Specifications of CY8C26643-24PI

• Core Processor: M8C
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 44
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.25 V
• Data Converters: A/D 1x8b, 1x11b, 1x12b; D/A 1x9b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-DIP (0.600", 15.24mm)
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Applications: CapSense
• Technology: CMOS
• Processing Unit: Microcontroller
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.25V
• Package Type: PDIP
• Screening Level: Industrial
• Pin Count: 48
• Mounting: Through Hole
• Rad Hardened: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant
• Other names: 428-1432; 428-1432-5; 428-1432

Table 88:
Accumulator Result 3 / Multiply/Accumulator Clear 0 Register (ACC_DR3 / MAC_CL0, Address = Bank 0, EEh)
Table 89:
Accumulator Result 2 / Multiply/Accumulator Clear 1 Register (ACC_DR2 / MAC_CL1, Address = Bank 0, EFh)
11.2
The output of a ∆−Σ modulator is a high-speed, single bit
A/D converter. A single bit A/D converter is of little use to
anyone and must be converted to a lower speed multiple
bit output. Converting this high-speed single bit data
stream to a lower speed multiple bit data stream requires
a data decimator.
110
Bit [7:0] : Data [7:0]
8-bit data value when read is the highest order result of the multiply/accumulate function
Any 8-bit data value when written will cause all four Accumulator result registers to clear
Bit [7:0] : Data [7:0]
8-bit data value when read is next to highest order result of the multiply/accumulate function
Any 8-bit data value when written will cause all four Accumulator result registers to clear
Read/Write
Read/Write
Bit Name
Bit Name
Bit #
POR
Bit #
POR
Decimator
Accumulator Result 3 / Multiply/Accumulator Clear 0 Register
Accumulator Result 2 / Multiply/Accumulator Clear 1 Register
Data [7]
Data [7]
RW
RW
7
0
7
0
Data [6]
Data [6]
RW
RW
Cypress MicroSystems CY8C25122/CY8C26233/CY8C26443/CY8C26643 Family Data Sheet
6
0
6
0
0
n
Document #: 38-12010 CY Rev. ** CMS Rev. 3.20
Coeff
Figure 29: Decimator Coefficients
0
Data [5]
Data [5]
RW
RW
5
0
5
0
Data [4]
n-1
Data [4]
RW
4
0
RW
4
0
A “divide by n” decimator is a digital filter that takes the
single bit data at a fast rate and outputs multiple bits at
one n
optimal filter has a sinc
implemented as a finite impulse response (FIR) filter and
for a “divide by n” implementation should have the follow-
ing coefficients:
th
Data [3]
the speed. For a single stage ∆−Σ converter, the
RW
Data [3]
3
0
RW
3
0
2n-1
Data [2]
t
RW
Data [2]
2
0
RW
2
2
0
response. This filter can be
Data [1]
RW
Data [1]
1
0
RW
1
0
September 5, 2002
Data [0]
Data [0]
RW
RW
0
0
0
0