DS80C310-MCL DALLAS [Dallas Semiconductor], DS80C310-MCL Datasheet - Page 10

• Manufacturer Part Number: DS80C310-MCL
• Description: High-Speed Micro
• Manufacturer: DALLAS [Dallas Semiconductor]

POWER ON RESET
The DS80C310 will hold itself in reset during a power-up until 65,536 clock cycles have elapsed. The
power-on reset used by the DS80C310 differs somewhat from other members of the High-Speed
Microcontroller family. The crystal oscillator may start anywhere between 1.0V and 4.5V but is not
specified. This eliminates the need for an RC reset circuit. For voltage-specific precision brownout
detection, an external component will be needed. When the device goes through a power-on reset, the
POR flag will be set in the WDCON (D8h) register at bit 6.
INTERRUPTS
The DS80C310 provides 10 interrupt sources with two priority levels. Software can assign high or low
priority to all sources. All interrupts that are new to the 8051 have a lower natural priority than the
originals.
INTERRUPT SOURCES AND PRIORITIES Table 4
TF0
TF1
SCON
TF2
INT2
INT4
INT0
INT1
INT3
INT5
NAME
External Interrupt 0
Timer 0
External Interrupt 1
Timer 1
T1 or R1 from the serial port
Timer 2
External Interrupt 2
External Interrupt 3
External Interrupt 4
External Interrupt 5
DESCRIPTION
10 of 23
VECTOR
0Bh
1Bh
2Bh
4Bh
5Bh
03h
13h
23h
43h
53h
PRIORITY
NATURAL
10
1
2
3
4
5
6
7
8
9
DS80C310