ZLF645S2864GP0001 Maxim Integrated, ZLF645S2864GP0001 Datasheet - Page 139

• Manufacturer Part Number: ZLF645S2864GP0001
• Description: 8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
• Manufacturer: Maxim Integrated

Specifications of ZLF645S2864GP0001

• Core: Z8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 1 KB
• Operating Supply Voltage: 2 V to 3.6 V
• Interface Type: UART
• Number Of Programmable I/os: 5
• Number Of Timers: 2 x 8 bit, 1 x 16 bit
• Processor Series: ZLF645
• Program Memory Type: Flash

Table 64. Interrupt Request Register (IRQ)
19-4572; Rev 0; 4/09
Bit Position
{[4:3], [0]} 
[2]
[1]
Bit
Field
Reset
R/W
Address
Bit Position
[7:6] 
Interrupt Request Register
R/W
Value
Bit 7 and Bit 6 of the Interrupt Request register (see
edge detection of the interrupts for Port 3, bit 1 and Port 3, bit 2. The remaining bits (5
through 0) indicate the status of the interrupt. When an interrupt is serviced, the hardware
automatically clears the bit to 0. Writing 1 to any of these bits generates an interrupt if the
appropriate bits in the Interrupt Mask register are enabled. Writing 0 to these bits clears
the interrupts.
Value
Interrupt Edge
7
0
000
001
010
100
101
011
110
111
00
01
10
11
0
1
0
1
Description
Interrupt Edge
P31
P31
P31
P31
Description
Group Priority
Reserved
C > A > B
A > B > C
A > C > B
B > C > A
C > B > A
B > A > C
Reserved
Group B Priority (IRQ0, IRQ2)
IRQ2 > IRQ0
IRQ0 > IRQ2
Group C Priority (IRQ1, IRQ4)
IRQ1 > IRQ4
IRQ4 > IRQ1
R/W




6
0
P32
P32
P32
P32




IRQ5
R/W
Bank Independent: FAh; Linear: 0FAh
5
0
IRQ4
R/W
4
0
IRQ3
R/W
3
0
Table
IRQ2
ZLF645 Series Flash MCUs
R/W
2
0
64) are used to configure the
Product Specification
Interrupt Request Register
IRQ1
R/W
1
0
IRQ0
R/W
0
0
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