DSM2190F4 STMicroelectronics, DSM2190F4 Datasheet - Page 25

• Manufacturer Part Number: DSM2190F4
• Description: DSM (Digital Signal Processor System Memory) For Analog Devices ADSP-2191 DSPs (3.3V Supply)
• Manufacturer: STMicroelectronics

DECODE PLD (DPLD)
The DPLD, shown in Figure 14, is used for decod-
ing the address for internal and external compo-
nents. The DPLD can be used to generate the
following decode signals:
Figure 14. DPLD Logic Array
I/O PORTS (PORT A, B,C)
MCELLAB.FB [ 7 :0] (Feedback)
MCELLBC.FB [ 7 :0] (Feedback )
PG0-PG7
A[15:0]
PD[2:0]
CNTRL[2:0] (Read/Write Control Signals)
RESET
RD_BSY
8 Main Flash memory Sector Select ( FS0-FS7 )
signals with three product terms each
4 Secondary Flash memory Sector Select
( CSBOOT0-CSBOOT3 ) signals with three
product terms each
(INPUTS)
(16)
(16)
(8)
(8)
(8)
(3)
(3)
(1)
(1)
1 internal csiop select for DSM device control
and status registers ( csiop is the base address
of the block of 256 byte locations)
1 JTAG Select signal (enables JTAG operations
on Port C when multiplexing JTAG signals with
general I/O signals)
3 external chip select output signals for Port D
pins, each with one product term.
3
3
3
3
3
3
3
3
3
3
3
3
1
1
1
1
1
CSIOP
JTAGSEL
ECS0
ECS1
ECS2
FS0
FS1
FS7
FS2
FS3
FS5
FS6
FS4
CSBOOT0
CSBOOT1
CSBOOT2
CSBOOT3
I/O Decoder
Select
JTAG ISP
External Chip Selects
to PORT D
8 Flash Main
Memory
Sector Selects
DSM2190F4
4 Secondary
Flash Memory
Sector Selects
AI04958
25/61