ADUC812BS Analog Devices Inc, ADUC812BS Datasheet - Page 46

• Manufacturer Part Number: ADUC812BS
• Description: IC ADC 12BIT MULTICH MCU 52-MQFP
• Manufacturer: Analog Devices Inc
• Series: MicroConverter® ADuC8xxr

Specifications of ADUC812BS

• Rohs Status: RoHS non-compliant
• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: PSM, Temp Sensor, WDT
• Number Of I /o: 34
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 640 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-MQFP, 52-PQFP

TIMING SPECIFICATIONS
ADuC812
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
ADuC812 Machine Cycle Time is nominally defined as MCLKIN/12.
CK
CKL
CKH
CKR
CKF
CYC
a Logic 0.
loaded V
LOAD
4
for Port 0, ALE, PSEN outputs = 100 pF; C
OH
/V
OL
level occurs.
DV
XTAL1 Period
XTAL1 Width Low
XTAL1 Width High
XTAL1 Rise Time
XTAL1 Fall Time
ADuC812 Machine Cycle Time
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
0.2V
TEST POINTS
0.2V
LOAD
CC
CC
Figure 50. Timing Waveform Characteristics
+ 0.9V
– 0.1V
(AV
for all other outputs = 80 pF, unless otherwise noted.
t
DD
CKH
= DV
Figure 49. XTAL 1 Input
DD
= 3.0 V or 5.0 V
Min
20
20
V
–46–
LOAD
t
CKL
12 MHz
Typ
83.33
1
V
V
LOAD
LOAD
– 0.1V
+ 0.1V
10%. All specifications T
t
CKR
Max
20
20
t
CK
REFERENCE
POINTS
TIMING
Min
62.5
20
20
Variable Clock
t
CKF
Typ
12t
A
= T
CK
MIN
V
V
LOAD
LOAD
IH
to T
min for a Logic 1 and V
Max
1000
20
20
– 0.1V
– 0.1V
MAX
, unless otherwise noted.)
V
LOAD
Unit
ns
µs
ns
ns
ns
ns
IL
REV. E
max for