ZLF645E0P2832G Zilog, ZLF645E0P2832G Datasheet - Page 57

• Manufacturer Part Number: ZLF645E0P2832G
• Description: Microcontrollers (MCU) 32K Flash 1K RAM 28 pin
• Manufacturer: Zilog

Specifications of ZLF645E0P2832G

• 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: 24
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-28
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: Details

Table 25. Stack Pointer Register Low Byte (SPL)
Table 26. Stack Pointer Register High Byte (SPH) or User Data Register (USER)
PS026407-0408
Bit
Field
Reset
R/W
Address
Bit Position
[7:0]
Bit
Field
Reset
R/W
Address
Notes:
R/W
R/W
Value
00-FF
X
X
7
7
1. For devices with 1K bytes of RAM and with 16-bit stack pointer mode enabled,
2. When ZLF645 MCU is not in 16-bit stack pointer mode, this register is available
the upper 6 bits of this register are unused for stack addressing. For devices with
512 bytes of RAM and with 16-bit stack pointer mode enabled, the upper 7 bits of
this register are unused for stack addressing.
to store use user data and its functionality is identical to other Zilog
products such as the ZLP12840 and ZLR64400 MCUs. When available for user
data, this register must not be used as a counter for the DJNZ instruction.
Description
Stack Pointer
R/W
R/W
X
X
6
6
R/W
R/W
Bank Independent: FEh; Linear: 0FEh
Bank Independent: FFh; Linear: 0FFh
X
X
5
5
R/W
R/W
Stack Pointer
Stack Pointer
X
X
4
4
R/W
R/W
X
X
3
3
ZLF645 Series Flash MCUs
R/W
R/W
X
X
2
2
Product Specification
Stack Pointer Register
R/W
R/W
X
X
1
1
®
Crimzon
R/W
R/W
X
X
0
0
49