ZLF645S0P2832G Zilog, ZLF645S0P2832G Datasheet - Page 131

• Manufacturer Part Number: ZLF645S0P2832G
• Description: Microcontrollers (MCU) 32K Flash 512B RAM 28 pin
• Manufacturer: Zilog

Specifications of ZLF645S0P2832G

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 512 KB
• Interface Type: ICP, UART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-28
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: Details

PS026407-0408
Table 62. Interrupt Types, Sources, and Vectors
When more than one interrupt is pending, priorities are resolved by a programmable
priority encoder controlled by the
activates when an interrupt request is granted. As a result, all subsequent interrupts are
disabled, and the Program Counter and Status Flags are saved. The cycle then branches to
the Program Memory vector location reserved for that interrupt.
All ZLF645 MCU interrupts are vectored through locations in the Program Memory. This
memory location and the next byte contain the 16-bit address of the interrupt service
routine for that particular interrupt request. To accommodate polled interrupt systems,
interrupt inputs are masked, and the
which of the interrupt requests require service.
An interrupt resulting from AN1 is mapped into IRQ2, and an interrupt from AN2 is
mapped into IRQ0. Interrupts IRQ2 and IRQ0 can be rising, falling, or both edge
triggered. These interrupts are user-programmable. The software can poll to identify the
state of the pin.
Name
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
Source
P32, UART Rx
P33, UART Tx, BRG,
SMR Event
P31
Timer 16
Timer 8
Low-Voltage Detection
Interrupt Priority
4, 5
6, 7
8, 9
Vector Location
(Program Memory)
0,1
2, 3
10, 11
Interrupt Request Register
Register. An interrupt machine cycle
ZLF645 Series Flash MCUs
Comments
External (P32), Rising, Falling
Edge Triggered
External (P33), Falling Edge
Triggered
External (P31), Rising, Falling
Edge Triggered
Internal
Internal
Internal
Product Specification
is polled to determine
Interrupts
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