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Z08617 Просмотр технического описания (PDF) - Zilog

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Z08617 NMOS Z8 8-BIT MCU KEYBOARD CONTROLLER Zilog
Zilog Zilog
Z08617 Datasheet PDF : 26 Pages
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FUNCTIONAL DESCRIPTION
Z08617 NMOS Z8® 8-BIT MCU
KEYBOARD CONTROLLER
The device incorporates special functions to enhance
Zilog's Z8 applications as a keyboard controller, scien-
tific research and advanced technologies applications.
The first 12 bytes of program memory are reserved for the
interrupt vectors. These locations have six 16-bit vectors
that correspond to the six available interrupts.
Program Memory. The 16-bit program counter ad-
dresses 4 Kbytes of program memory space at inter-
nal locations (Figure 9).
Byte 12 to byte 4095 consists of on-chip, mask
programmed ROM. Addresses 4096 and greater are
reserved.
65535
4096
Location of 4095
First Byte of
Instruction
Executed
After RESET 12
11
10
9
8
7
Interrupt
Vector 6
(Lower Byte)
5
4
Interrupt
Vector 3
(Upper Byte)
2
1
0
Reserved
On-Chip
ROM
IRQ5
IRQ5
IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
IRQ0
Figure 9. Program Memory Map
10
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