SST89E554RC-40-I-PIE Microchip Technology, SST89E554RC-40-I-PIE Datasheet - Page 63

• Manufacturer Part Number: SST89E554RC-40-I-PIE
• Description: 8-bit Microcontrollers - MCU 32KB+8KB 40ns
• Manufacturer: Microchip Technology

Specifications of SST89E554RC-40-I-PIE

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Program Memory Size: 32 KB
• Data Ram Size: 1 KB
• On-chip Adc: No
• Operating Supply Voltage: 4.5 V to 5.5 V
• Package / Case: PDIP-40
• Mounting Style: Through Hole
• Data Rom Size: 128 B
• Interface Type: SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• Processor Series: FlashFlex
• Program Memory Type: Flash
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V

FlashFlex MCU
SST89E564RD / SST89V564RD
SST89E554RC / SST89V554RC
10.4 Interrupt Priority and Polling Sequence
The device supports eight interrupt sources under a four level priority scheme. Table 10-1 summarizes the polling
sequence of the supported interrupts. Note that the SPI serial interface and the UART share the same interrupt
vector. (See Figure 10-2)
TABLE 10-1: I
©2007 Silicon Storage Technology, Inc.
Description
Ext. Int0
Brown-out
T0
Ext. Int1
T1
PCA
UART/SPI
T2
NTERRUPT
Interrupt Flag
TF2, EXF2
TI/RI/SPIF
CF/CCFn
TF0
TF1
IE0
IE1
-
P
OLLING
S
Address
Vector
004BH
000BH
001BH
002BH
EQUENCE
0003H
0013H
0033H
0023H
Interrupt
Enable
EBO
EX0
ET0
EX1
ET1
ET2
EC
ES
63
Interrupt
Priority
PBO/H
PX0/H
PX1/H
PT0/H
PT1/H
PPCH
PT2/H
PS/H
1(highest)
Service
Priority
2
6
7
8
3
4
5
S71207-08-EOL
EOL Data Sheet
Power-down
Wake-Up
yes
yes
no
no
no
no
no
no
T10-1.2 1207
1/07