CY8C26643-24AXI Cypress Semiconductor Corp, CY8C26643-24AXI Datasheet - Page 37

• Manufacturer Part Number: CY8C26643-24AXI
• Description: IC MCU 16K FLASH 256B 44LQFP
• Manufacturer: Cypress Semiconductor Corp
• Series: PSOC™ CY8C26xxxr

Specifications of CY8C26643-24AXI

• Core Processor: M8C
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 40
• 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: 44-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 428-1645

Table 37:
1.
External Crystal Oscillator Trim Register (ECO_TR, Address = Bank 1, EBh)
7.1.4
S
S
Note : Use this equation if you do not employ PLL mode.
If you do employ PLL with the External Crystal Oscillator,
see Application Note
www.cypressmicro.com
error of 1 pF in C1 and C2 gives about 3 ppm error in fre-
quency.
September 5, 2002
Bit [7:6] : PSSDC [1:0] Power System Sleep Duty Cycle. (Not recommended for customer alteration)
0 0 = 1/128
0 1 = 1/512
1 0 = 1/32
1 1 = 1/8
Bit 5 : Reserved
Bit 4 : Reserved
Bit [3:2] : Amp [1:0] Sets the amplitude of the adjustment. (Not recommended for customer alteration)
Bit [1:0] : Bias [1:0] Sets the bias of the adjustment. (Not recommended for customer alteration)
Read/Write
Bit Name
FS = Factory set trim value
Crystal – 32.768 kHz watch crystal such as EPSON
C-002RX (12.5 pF load capacitance)
Capacitors – C1, C2
Use NPO-type ceramic caps
C1 = C2 = 25 pF - (Package Cap) - (Board Parasitic
Cap)
Bit #
POR
XtalIn
External Crystal Oscillator Trim Register
External Crystal Oscillator Component Connections and Selections
PSSDC [1] PSSDC [0]
FS
W
7
1
AN2027
for equation and details. An
Figure 8: External Crystal Oscillator Connections
FS
under Support at
W
6
1
Document #: 38-12010 CY Rev. ** CMS Rev. 3.20
V
c c
Reserved
C1
--
5
0
http://
Crys tal
Crys tal
Crys tal
Crys tal
Reserved
--
4
0
Table 38:
8 PDIP
20 PDIP
20 SOIC
20 SSOP
28 PDIP
28 SOIC
28 SSOP
44 TQFP
48 PDIP
48 SSOP
Package
Amp [1]
FS
W
3
1
Typical Package Capacitances
V
c c
C2
Amp [0]
Package Capacitance
FS
W
2
1
XtalOut
Bias [1]
FS
W
1
1
0.9 pF
0.5 pF
0.5 pF
0.5 pF
0.6 pF
2 pF
1 pF
2 pF
1 pF
5 pF
Bias [0]
FS
Clocking
W
0
1
37