ADUC831 Analog Devices, ADUC831 Datasheet - Page 66

• 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

ADuC831
TIMING SPECIFICATIONS
Parameter
CLOCK INPUT (External Clock Driven XTAL1)
t
t
t
t
t
t
NOTES
1
2
3
4
AC inputs during testing are driven at DV
For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to float when a 100 mV change from the
C
ADuC831 Machine Cycle Time is nominally defined as MCLKIN/12.
CK
CKL
CKH
CKR
CKF
CYC
a Logic 0.
loaded V
LOAD
4
for Port0, ALE, PSEN outputs = 100 pF; C
OH
/V
OL
level occurs.
XTAL1 Period
XTAL1 Width Low
XTAL1 Width High
XTAL1 Rise Time
XTAL1 Fall Time
ADuC831 Machine Cycle Time
DV
DD
– 0.5V
0.45V
DD
– 0.5 V for a Logic 1 and 0.45 V for a Logic 0. Timing measurements are made at V
1, 2, 3
0.2DV
0.2DV
TEST POINTS
LOAD
Figure 69. Timing Waveform Characteristics
DD
DD
(AV
for all other outputs = 80 pF unless otherwise noted.
– 0.1V
+ 0.9V
t
CKH
DD
= DV
Figure 68. XTAL 1 Input
DD
= 3.0 V or 5.0 V
20
Min
20
–66–
t
V
CKL
12 MHz
LOAD
Typ
83.33
1
V
V
LOAD
LOAD
10%. All specifications T
t
– 0.1V
+ 0.1V
CKR
Max
20
20
t
CK
REFERENCE
Min
62.5
20
20
POINTS
TIMING
Variable Clock
t
CKF
A
Typ
12t
= T
CK
MIN
V
V
LOAD
LOAD
to T
IH
min for a Logic 1 and V
Max
1000
20
20
MAX
– 0.1V
– 0.1V
, unless otherwise noted.)
V
LOAD
Unit
ns
ns
ns
ns
ns
µs
IL
Figure
REV. 0
68
68
68
68
68
max for