z86l88 ZiLOG Semiconductor, z86l88 Datasheet - Page 26

• Manufacturer Part Number: z86l88
• Description: Low-voltage Ir Microcontroller
• Manufacturer: ZiLOG Semiconductor

Functional Description
PS024102-0804
Program Memory
RAM
Expanded Register File
The Z86L88 incorporates special functions to enhance the Z8's functionality in
consumer and battery-operated applications.
The Z86L88 device addresses 16 KB of internal program memory. The first 12
bytes are reserved for interrupt vectors. These locations contain the five 16-bit
vectors that correspond to the five available interrupts.
The Z86L88 device has 237 bytes of RAM that make up the register file.
Figure 10. Program Memory Map (16K ROM)
The register file has been expanded to allow for additional system control regis-
ters and for mapping of additional peripheral devices into the register address
area. The Z8 register address space R0 through R15 has been implemented as
After RESET
(Upper Byte)
(Lower Byte)
First byte of
Location of
Instruction
Executed
Interrupt
Interrupt
Vector
Vector
16383
12
10
11
9
8
7
6
5
4
3
2
1
0
Reset Start Address
On-Chip ROM
Not Accessible
IRQ5
IRQ5
IRQ4
IRQ1
IRQ4
IRQ3
IRQ3
IRQ2
IRQ1
IRQ0
IRQ0
IRQ2
Low-Voltage IR Microcontroller
Z86L88
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