ZLF645S0P2864G Zilog, ZLF645S0P2864G Datasheet - Page 81

• Manufacturer Part Number: ZLF645S0P2864G
• Description: Microcontrollers (MCU) 64K Flash 512B RAM 28 pin
• Manufacturer: Zilog

Specifications of ZLF645S0P2864G

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 64 KB
• Data Ram Size: 512 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 36. Flash Page Select Register (FPS)
Table 37. Flash Sector Protect Register (FSEC)
PS026407-0408
Bit Position
[7]
[6:0]
Bits
Field
Reset
R/W
Address
Bits
Field
Reset
R/W
Address
Flash Sector Protect Register
SPROT7
IFEN
R/W
R/W
7
0
7
0
The Flash Sector Protect register (see
Select register. When the Flash Control register is unlocked and written with 5EH, the next
write to this address targets the Flash Sector Protect register. In all other cases, it
targets the Flash Page Select register.
This register selects which of the 8 available Flash memory sectors to be protected. The
reset state of each Sector Protect bit is an unprotected state. After a sector is protected by
setting its corresponding register bit, it cannot be unprotected (the register bit cannot be
cleared) without powering down the device.
Value
0
1
0
1
SPROT6
R/W
R/W
6
0
6
0
Description
IFEN —Information Area Enable
Operation to be performed on Flash main memory.
Operation to be performed on Flash Information Area.
PAGE —Page Select
This 7-bit field identifies the Flash main memory page for Page Erase and
Page unlocking. Program Memory Address[15:9] = PAGE[6:0].
The least significant 2 bits of Page identifies the Flash Information page for
Page Erase and Page unlocking. The upper significant bits must be logic 0’s.
SPROT5
R/W
R/W
5
0
5
0
Bank F, Register address: 02H
Bank F, Register address 02H
SPROT4
R/W
R/W
4
0
4
0
Table
SPROT3
PAGE
R/W
R/W
37) address is shared with the Flash Page
3
0
3
0
SPROT2
R/W
R/W
ZLF645 Series Flash MCUs
2
0
2
0
Flash Control Register Definitions
Product Specification
SPROT1
R/W
R/W
1
0
0
1
SPROT0
R/W
R/W
0
0
0
0
73