參數(shù)資料
型號: UPSD3214AV-24T1T
廠商: 意法半導(dǎo)體
英文描述: Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM
中文描述: 閃存可編程系統(tǒng)設(shè)備與8032微控制器核心和64Kbit SRAM的
文件頁數(shù): 118/176頁
文件大?。?/td> 1081K
代理商: UPSD3214AV-24T1T
μ
PSD323X
118/176
Separate Space Mode.
Program space is sepa-
rated fromData space. For example, Program Se-
lect Enable (PSEN) is used to access the program
code from the primary Flash memory, while READ
Strobe (RD) is used to access data from the sec-
ondary Flash memory, SRAM and I/O Port blocks.
This configuration requires the VM Register to be
set to 0Ch (see Figure 55).
Combined Space Modes.
The
Data spaces are combined into one memory
space that allows the primary Flash memory, sec-
ondary Flash memory, and SRAM to be accessed
by either Program Select Enable (PSEN) orREAD
Strobe (RD). For example, to configure the prima-
ry Flash memory in Combined space, Bits b2 and
b4 of the VMRegister are set to ’1’(see Figure56).
Program
and
Figure 55. Separate Space Mode
Figure 56. Combined Space Mode
Primary
Flash
Memory
DPLD
Secondary
Flash
Memory
SRAM
RS0
CSBOOT0-3
FS0-FS7
CS
CS
CS
OE
OE
RD
PSEN
OE
AI02869C
Primary
Flash
Memory
DPLD
Secondary
Flash
Memory
SRAM
RS0
CSBOOT0-3
FS0-FS7
RD
CS
CS
CS
RD
OE
OE
VM REG BIT 2
PSEN
VM REG BIT 0
VM REG BIT 1
VM REG BIT 3
VM REG BIT 4
OE
AI02870C
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