PSD4235G2V-12UI STMicroelectronics, PSD4235G2V-12UI Datasheet - Page 70
PSD4235G2V-12UI
Manufacturer Part Number
PSD4235G2V-12UI
Description
IC FLASH 4MBIT 120NS 80TQFP
Manufacturer
STMicroelectronics
Datasheet
1.PSD4235G2-70U.pdf
(129 pages)
Specifications of PSD4235G2V-12UI
Format - Memory
FLASH
Memory Type
FLASH
Memory Size
4M (512K x 8)
Speed
120ns
Interface
Parallel
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TQFP, 80-VQFP
Number Of Macrocells
24
Maximum Operating Frequency
25.6 MHz
Delay Time
90 ns
Operating Supply Voltage
3 V to 3.6 V
Maximum Operating Temperature
85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-1970
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PSD4235G2V-12UI
Manufacturer:
STMicroelectronics
Quantity:
10 000
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MCU bus interface
19.1
Figure 18. An example of a typical 16-bit multiplexed bus interface
70/129
RESET
MCU
PSD interface to a multiplexed bus
Figure 18
PSD4235G2. The ADIO port on the PSD is connected directly to the MCU address/data
bus. Address Strobe (ALE/AS, PD0) latches the address signals internally. Latched
addresses can be brought out to Port E, F or G. The PSD drives the ADIO data bus only
when one of its internal resources is accessed and Read Strobe (RD, CNTL1) is active.
Should the system address bus exceed sixteen bits, Ports A, B, C, or F may be used as
additional address inputs.
BHE
ALE
WR
RD
shows an example of a system using a MCU with a 16-bit multiplexed bus and a
AD[15:8] 1
AD [ 7:0 ]
or A[15:8]
PSD
WR ( CNTRL0 )
RD ( CNTRL1 )
BHE ( CNTRL2 )
RST
ALE ( PD0 )
PORT D
PORT
ADIO
PORT
PORT
PORT
G
A
F
( OPTIONAL )
( OPTIONAL )
( OPTIONAL )
A [ 23:16 ]
A [ 7: 0 ]
A [ 15: 8 ]
PSD4235G2
AI04928B
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