ZLF645E0P2032G Zilog, ZLF645E0P2032G Datasheet - Page 49

• Manufacturer Part Number: ZLF645E0P2032G
• Description: Microcontrollers (MCU) 32K Flash 1K RAM 20 pin
• Manufacturer: Zilog

Specifications of ZLF645E0P2032G

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 1 KB
• Interface Type: ICP, UART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-20
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: Details

Memory and Registers
PS026407-0408
Flash Program/Constant Memory
The Z8
features to extend the available memory space while maintaining the benefits of a Z8
CPU core in battery-operated applications.
The ZLF645 Series of Flash MCUs can address up to 64 KB of Flash memory for object
code (program instructions and immediate data) and constant data (ROM tables and data
constants). The first 12 bytes of the memory are reserved for the six available 16-bit inter-
rupt request (IRQ) vectors. On reset, program execution begins at address
memory. Execution rolls over to the beginning of the memory if the program counter
address exceeds the Flash memory size.
The entire Flash memory is available for either program code or constant data. Outside of
normal instruction fetches, the CPU can access the Flash memory by using LDC and
LDCI instructions. The LDC and LDCI instructions use 16-bit addresses to access the
memory.
®
LXMC CPU used in the ZLF645 Series of Flash MCUs incorporates special
Figure 12
Figure 12. Program/Constant Memory Map
displays the Program/Constant memory map for the device.
0000h = 16-bit Address
FLASH Memory
000Ch (Reset)
Up to 64 KB
Constants
Program
IRQ 0–5
Vectors
or
ZLF645 Series Flash MCUs
Product Specification
Memory and Registers
(
Not to Scale)
000Ch
in the
®
41