ADUC831 Analog Devices, ADUC831 Datasheet - Page 69

• Manufacturer Part Number: ADUC831
• Description: Precision Analog Microcontroller: 1.3MIPS 8052 MCU + 62kB Flash + 8-Ch 12-Bit ADC + Dual 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC831

• Mcu Core: 8052
• Mcu Speed (mips): 1.3
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 8
• Other: PWM

Parameter
EXTERNAL DATA MEMORY WRITE CYCLE
t
t
t
t
t
t
t
t
t
REV. 0
WLWH
AVLL
LLAX
LLWL
AVWL
QVWX
QVWH
WHQX
WHLH
WR Pulsewidth
Address Valid after ALE Low
Address Hold after ALE Low
ALE Low to RD or WR Low
Address Valid to RD or WR Low
Data Valid to WR Transition
Data Setup before WR
Data and Address Hold after WR
RD or WR High to ALE High
PORT 2 (O)
PSEN (O)
ALE (O)
WR (O)
M
CLK
t
AVLL
Figure 72. External Data Memory Write Cycle
A16–A23
A0–A7
t
LLAX
t
AVWL
t
LLWL
Min
400
43
48
200
203
33
433
33
43
–69–
12 MHz
t
QVWX
t
DATA
A8–A15
QVWH
Max
300
123
t
WLWH
t
t
t
Min
6t
t
t
3t
4t
7t
CK
CK
CK
CK
CK
Variable Clock
CK
CK
CK
CK
– 40
– 35
– 50
– 50
– 40
– 100
– 50
– 130
– 150
t
WHLH
t
WHQX
Max
3t
6t
CK
CK
+ 50
– 100
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ADuC831
Figure
72
72
72
72
72
72
72
72
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