AT89LP6440-20PU Atmel, AT89LP6440-20PU Datasheet - Page 179

• Manufacturer Part Number: AT89LP6440-20PU
• Description: MCU 8051 64K FLASH ISP 40PDIP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP6440-20PU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 38
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 8K x 8
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 26-12. Two-wire Serial Bus Timing
26.9
The values in this table are valid for V
Figure 26-13. Shift Register Mode Timing Waveform
3706A–MICRO–9/09
SCL
SDA
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
3. C
4. f
Serial Port Timing: Shift Register Mode
t
SU;STA
Write to SBUF
Write to SBUF
Output Data
Output Data
CK
Input Data
Input Data
Parameter
Serial Port Clock Cycle Time
Output Data Setup to Clock Rising Edge
Output Data Hold after Clock Rising Edge
Input Data Hold after Clock Rising Edge
Input Data Valid to Clock Rising Edge
b
Clear RI
Clear RI
= capacitance of one bus line in pF.
= CPU clock frequency
Clock
Clock
t
HD;STA
0
Valid
Valid
t
of
t
0
LOW
DD
= 2.4V to 3.6V and Load Capacitance = 80 pF.
1
Valid
Valid
1
t
HIGH
t
HD;DAT
2
Valid
Valid
2
4t
3t
t
CLCL
CLCL
CLCL
Min
15
0
t
LOW
-15
3
-15
Valid
Valid
-15
SMOD1 = 0
SMOD1 = 0
SMOD1 = 1
3
t
SU;DAT
AT89LP6440 - Preliminary
4
Valid
Valid
Max
4
5
Valid
Valid
2t
5
t
t
CLCL
CLCL
CLCL
Min
15
0
-15
-15
-15
SMOD1 = 1
6
Valid
Valid
6
t
SU;STO
t
Max
r
7
Valid
Valid
7
Units
t
BUF
µs
ns
ns
ns
ns
179