PSD834F2-10JIT 查看數據表（PDF） - STMicroelectronics

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PSD834F2-10JIT

Flash PSD, 3.3V Supply, for 8-bit MCUs 2 Mbit + 256 Kbit Dual Flash Memories and 64 Kbit SRAM

STMicroelectronics 

PSD834F2V

Combined Space Modes. The Program and

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, CNTL2)

or Read Strobe (RD, CNTL1). For example, to

configure the primary Flash memory in Combined

space, Bits b2 and b4 of the VM register are set to

1 (see Figure 8).

Figure 8. 8031 Memory Modules – Combined Space

DPLD

RS0

Primary

Flash

Secondary

Flash

SRAM

Memory

Memory

RD

CSBOOT0-3

FS0-FS7

CS

OE

CS

OE

CS

OE

VM REG BIT 3

) VM REG BIT 4

ct(s PSEN

du VM REG BIT 1

Pro VM REG BIT 2

Obsolete Product(s) - Obsolete VMREGBIT0

RD

AI02870C

25/95

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