ADUC824 Analog Devices, ADUC824 Datasheet - Page 8

• Manufacturer Part Number: ADUC824
• Description: Precision Analog Microcontroller: 1MIPS 8052 MCU + 8kB Flash + 16/24-Bit ADC + 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC824

• Mcu Core: 8052
• Mcu Speed (mips): 1
• Sram (bytes): 256Bytes
• Gpio Pins: 34
• Adc # Channels: 4

ADuC824
TIMING SPECIFICATIONS
Parameter
CLOCK INPUT (External Clock Driven XTAL1)
NOTES
1
2
3
4
5
6
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
ADuC824 internal PLL locks onto a multiple (384 times) the external crystal frequency of 32.768 kHz to provide a Stable 12.583 MHz internal clock for the system.
This number is measured at the default Core_Clk operating frequency of 1.57 MHz.
ADuC824 Machine Cycle Time is nominally defined as 12/Core_CLK.
a Logic 0 as shown in Figure 2.
loaded V
The core can operate at this frequency or at a binary submultiple called Core_Clk, selected via the PLLCON SFR.
LOAD
t
t
t
t
t
1/t
t
t
CK
CKL
CKH
CKR
CKF
CORE
CYC
CORE
for Port0, ALE, PSEN outputs = 100 pF; C
OH
/V
OL
level occurs as shown in Figure 2.
XTAL1 Period
XTAL1 Width Low
XTAL1 Width High
XTAL1 Rise Time
XTAL1 Fall Time
ADuC824 Core Clock Frequency
ADuC824 Core Clock Period
ADuC824 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
DD
DD
(AV
all specifications T
for all other outputs = 80 pF unless otherwise noted.
– 0.1V
+ 0.9V
t
CHK
5
DD
6
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV
4
32.768 kHz External Crystal
0.098
0.95
Min
MIN
V
t
LOAD
CKL
to T
V
V
MAX
LOAD
LOAD
unless otherwise noted.)
– 0.1V
+ 0.1V
t
CKR
Typ
30.52
15.24
15.24
20
20
0.636
7.6
t
CK
REFERENCE
Max
12.58
122.45
POINTS
TIMING
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V;
t
CKF
V
V
Unit
µs
µs
µs
ns
ns
MHz
µs
µs
LOAD
LOAD
IH
min for a Logic 1 and V
– 0.1V
+ 0.1V
V
LOAD
Figure
1
1
1
1
1
IL
max for