AT89LP52-20PU Atmel, AT89LP52-20PU Datasheet - Page 100

• Manufacturer Part Number: AT89LP52-20PU
• Description: IC MCU 8051 8K FLASH SPI 40PDIP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP52-20PU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: Serial
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

18.7
The values in this table are valid for V
Figure 18-9. Shift Register Mode Timing Waveform
18.8
18.8.1
Note:
100
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
Serial Port Timing: Shift Register Mode
Test Conditions
1. AC Inputs during testing are driven at V
AT89LP51/52 - Preliminary
AC Testing Input/Output Waveform
Write to SBUF
Write to SBUF
V
Output Data
Output Data
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
IH
Clear RI
Clear RI
min. for a logic “1” and V
Clock
Clock
0
Valid
Valid
0
IL
DD
max. for a logic “0”.
= 2.4V to 5.5V and Load Capacitance = 80 pF.
1
Valid
Valid
1
DD
(1)
- 0.5V for a logic “1” and 0.45V for a logic “0”. Timing measurements are made at
2
Valid
Valid
2
3t
4t
t
CLCL
CLCL
CLCL
Min
15
0
-15
3
Valid
Valid
-15
-15
SMOD1 = 0
SMOD1 = 0
SMOD1 = 1
3
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
Max
7
Valid
Valid
3709B–MICRO–12/10
7
Units
µs
ns
ns
ns
ns