Z86L70 Datasheet, PDF (19/61 Pages) Zilog, Inc. – IR/Low-Voltage Microcontroller

Zilog
FUNCTIONAL DESCRIPTION
The Z8 incorporates special functions to enhance the Z8's
functionality in consumer and battery operated applica-
tions.
Reset. The device is reset in one of the following condi-
tions:
1. Power-On Reset
2. Watch-Dog Timer
3. Stop-Mode Recovery Source
4. Low Voltage Detection
Program Memory. The Z86L7X addresses up to 2K, 4K,
8 KB of internal program memory, with the remainder be-
ing external memory (Figure 13). The first 12 bytes of pro-
gram memory are reserved for the interrupt vectors. These
locations contain five 16-bit vectors that correspond to the
five available interrupts. Addresses 12 to 2K, 4K, 8K (de-
pendent on version) consist of on-chip mask-programmed
ROM.
Location of
First Byte of
Instruction
Executed
After RESET
12
11
10
9
8
7
Interrupt
Vector
(Lower Byte) ⁶
5
4
Interrupt
Vector
(Upper Byte) ³
2
1
0
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
1
On-Chip
ROM
Reset Start Address
Reserved
Reserved
IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
IRQ0
Figure 13. Program Memory Map
DS97LVO0500
PRELIMINARY
1-19