AT87C51RD2-RLTUL Atmel, AT87C51RD2-RLTUL Datasheet - Page 40
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AT87C51RD2-RLTUL
Manufacturer Part Number
AT87C51RD2-RLTUL
Description
IC 8051 MCU 64K OTP 30MHZ 44VQFP
Manufacturer
Atmel
Series
87Cr
Datasheet
1.TS87C51RB2-VIA.pdf
(86 pages)
Specifications of AT87C51RD2-RLTUL
Core Processor
8051
Core Size
8-Bit
Speed
30/20MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
64KB (64K x 8)
Program Memory Type
OTP
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
UART
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
6.5
Figure 6-13. Interrupt Control System
40
Interrupt System
EXF2
INT0
INT1
PCA IT
AT/TS8xC51Rx2
TF0
TF1
TF2
RI
TI
Individual Enable
The TS80C51Rx2 has a total of 7 interrupt vectors: two external interrupts (INT0 and INT1),
three timer interrupts (timers 0, 1 and 2), the serial port interrupt and the PCA global interrupt.
These interrupts are shown in Figure 6-13.
WARNING: Note that in the first version of RC devices, the PCA interrupt is in the lowest priority.
Thus the order in INT0, TF0, INT1, TF1, RI or TI, TF2 or EXF2, PCA.
Each of the interrupt sources can be individually enabled or disabled by setting or clearing a bit
in the Interrupt Enable register (See Table 6-17.Table 6-18.). This register also contains a global
disable bit, which must be cleared to disable all interrupts at once.
Each interrupt source can also be individually programmed to one out of four priority levels by
setting or clearing a bit in the Interrupt Priority register (See Table 6-18.) and in the Interrupt Pri-
ority High register (See Table 6-19.). shows the bit values and priority levels associated with
each combination.
The PCA interrupt vector is located at address 0033H. All other vector addresses are the same
as standard C52 devices.
IE0
IE1
IPH, IP
3
0
3
0
3
0
3
0
3
0
3
0
3
0
Global Disable
High priority
interrupt
Interrupt
polling
sequence, decreasing from
high to low priority
Low priority
interrupt
4188F–8051–01/08