z86e54 ZiLOG Semiconductor, z86e54 Datasheet - Page 34

• Manufacturer Part Number: z86e54
• Description: Z8 512 Byte Otp Mcu
• Manufacturer: ZiLOG Semiconductor

PS020102-1003
Register File
The Register File consists of three I/O port registers, 61 general-purpose regis-
ters, and 14 control and status registers R0, R2-R3, R4–R63, R254 and R241–
R253, and R255, respectively (Figure 14). General-purpose registers occupy the
04h to 3Fh address space. I/O ports are mapped as per the existing CMOS Z8.
After RESET
(Upper Byte)
(Lower Byte)
First Byte of
Location of
Instruction
Executed
Interrupt
Interrupt
Vector
Vector
Figure 13.Program Memory Map
511
12
11
10
9
8
7
6
5
4
3
2
1
0
On-Chip
IRQ30
IRQ5
IRQ5
IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
ROM
Z8
®
512 Byte OTP MCU
Z86E54
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