参数资料
型号: 71M6541F-DB
厂商: Maxim Integrated Products
文件页数: 115/166页
文件大小: 0K
描述: DEMO BOARD 71M6541F
标准包装: 1
系列: *
71M6541D/F/G and 71M6542F/G Data Sheet
Name
Location
Rst Wk Dir
Description
Flash Bank Selection (71M6541G and 71M6542G only)
The program memory of the 71M6541G/71M6542G consists of a fixed lower
bank of 32 KB, addressable at 0x0000 to 0x7FFF plus an upper banked area
of 32 KB, addressable at 0x8000 to 0xFFFF. The I/O RAM register FL_BANK
is used to switch one of four memory banks of 32 KB each into the address
range from 0x8000 to 0xFFFF. Note that when FL_BANK = 0, the upper bank
is the same as the lower bank.
FL_BANK
SFR B6
01 01 R/W
Address Range for
Address Range for
FL_BANK[1:0]
00
01
10
11
Lower Bank
(0x0000-0x7FFF)
0x0000-0x7FFF
0x0000-0x7FFF
0x0000-0x7FFF
0x0000-0x7FFF
Upper Bank
(0x8000-0xFFFF)
0x00000-0x07FFF
0x08000-0x0FFFF
0x10000-0x17FFF
0x18000-0x1FFFF
Flash Erase Initiate
FLSH_ERASE is used to initiate either the Flash Mass Erase cycle or the Flash
Page Erase cycle. Specific patterns are expected for FLSH_ERASE in order
to initiate the appropriate Erase cycle.
FLSH_ERASE[7:0]
SFR 94[7:0]
0
0
W
(default = 0x00).
0x55 = Initiate Flash Page Erase cycle. Must be proceeded by a write to
FLSH_PGADR[5:0] ( SFR 0xB7[7:2] ).
0xAA = Initiate Flash Mass Erase cycle. Must be proceeded by a write to
FLSH_MEEN and the ICE port must be enabled.
Any other pattern written to FLSH_ERASE has no effect.
Mass Erase Enable
FLSH_MEEN
SFR B2[1]
0
0
W
0 = Mass Erase disabled (default).
1 = Mass Erase enabled.
Must be re-written for each new Mass Erase cycle.
FLSH_PEND
SFR B2[3]
0
0
R
Indicates that a timed flash write is pending. If another flash write is attempted,
it is ignored.
Flash Page Erase Address
FLSH_PGADR[5:0]
SFR B7[7:2]
0
0
W
FLSH_PGADR[5:0] – Flash Page Address (page 0 thru 63) that is erased during
the Page Erase cycle. (default = 0x00).
Must be re-written for each new Page Erase cycle.
Rev 4
115
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