Z86E4000ZDV Zilog, Z86E4000ZDV Datasheet - Page 31

• Manufacturer Part Number: Z86E4000ZDV
• Description: 44 PIN PLCC ADAPTER
• Manufacturer: Zilog

Specifications of Z86E4000ZDV

• Convert From (adapter End): 40-Pin DIP ZIF Socket
• Convert To (adapter End): 44-PLCC Plug
• For Use With/related Products: Zilog Emulators/Programmers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-2015

Zilog
FUNCTIONAL DESCRIPTION
The MCU incorporates the following special functions to
enhance the standard Z8 architecture to provide the user
with increased design flexibility.
RESET. The device is reset in one of three ways:
1. Power-On Reset
2. Watch-Dog Timer
3. STOP-Mode Recovery Source
Note: Having the Auto Power-On Reset circuitry built-in,
the MCU does not need to be connected to an external
power-on reset circuit. The reset time is 5 ms (typical). The
MCU does not reinitialize WDTMR, SMR, P2M, and P3M
registers to their reset values on a STOP-Mode Recovery
operation.
EPROM Protect. When in ROM Protect Mode, and exe-
cuting out of External Program Memory, instructions LDC,
LDCI, LDE, and LDEI cannot read Internal Program Mem-
ory.
DS97Z8X0502
After RESET
(Lower Byte)
(Upper Byte)
First Byte of
Location of
Instruction
Executed
Interrupt
Interrupt
Vector
Vector
65535
4096
4095
12
11
10
9
8
7
6
5
4
3
2
1
0
On-Chip One Time PROM
Figure 22. Program Memory Map
ROM and RAM
EPROM
External
(ROMless Z86E40 Only)
IRQ5
IRQ5
IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
IRQ0
P R E L I M I N A R Y
Note: The device V
specification before the TPOR expires.
Program Memory. The MCU can address up to 4 KB of
Internal Program Memory (Figure 22). The first 12 bytes of
program memory are reserved for the interrupt vectors.
These locations contain six 16-bit vectors that correspond
to the six available interrupts. For EPROM mode, byte 12
(000CH) to address 4095 (0FFFH) consists of program-
mable EPROM. After reset, the program counter points at
the address 000CH, which is the starting address of the
user program.
In ROMless mode, the Z86E40 can address up to 64 KB
of External Program Memory. The ROM/ROMless option
is only available on the 44-pin devices.
When in ROM Protect Mode and executing out of Internal
Program Memory, instructions LDC, LDCI, LDE, and LDEI
can read Internal Program Memory.
ROM and RAM
ROMless
External
IRQ5
IRQ5
IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
IRQ0
CC
must rise up to the operating V
Z8 4K OTP Microcontroller
Z86E30/E31/E40
CC
31
1