PSD834F2-90M STMicroelectronics, PSD834F2-90M Datasheet - Page 32

• Manufacturer Part Number: PSD834F2-90M
• Description: IC FLASH 2MBIT 90NS 52QFP
• Manufacturer: STMicroelectronics

Specifications of PSD834F2-90M

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 2M (256K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 52-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2008

PSD813F2V, PSD854F2V
PAGE REGISTER
The 8-bit Page Register increases the addressing
capability of the MCU by a factor of up to 256. The
contents of the register can also be read by the
MCU. The outputs of the Page Register (PGR0-
PGR7) are inputs to the DPLD decoder and can be
included
CSBOOT0-CSBOOT3), and SRAM Select (RS0)
equations.
Figure 12. Page Register
32/109
in
the
Sector
Select
RESET
R / W
D0 - D 7
(FS0-FS7,
D 0
D 1
D 2
D 3
D 4
D 5
D 6
D 7
Doc ID 10552 Rev 3
REGISTER
PAGE
Q 0
Q 1
Q 2
Q 3
Q 4
Q 5
Q 6
Q 7
PGR0
PGR1
PGR2
PGR3
PGR4
PGR5
PGR6
PGR7
If memory paging is not needed, or if not all 8 page
register bits are needed for memory paging, then
these bits may be used in the CPLD for general
logic. See Application Note AN1154.
Figure
flops in the register are connected to the internal
data bus D0-D7. The MCU can write to or read
from the Page Register. The Page Register can be
accessed at address location CSIOP + E0h.
12
shows the Page Register. The eight flip-
DPLD
CPLD
PLD
AND
INTERNAL
SELECTS
AND LOGIC
AI02871B