AN1386 STMicroelectronics, AN1386 Datasheet - Page 2

• Manufacturer Part Number: AN1386
• Description: USING THE DSM2180F3 WITH THE ANALOG DEVICES ADSP-2185
• Manufacturer: STMicroelectronics

AN1386 - APPLICATION NOTE
PURPOSE
The DSM2180F3 device is designed to interface directly with the popular Analog Devices ADSP-218X se-
ries of DSPs. The DSM2180F3 device provides bootloading capability and enables the core DSP design
to be done with two chips.
The DSM JTAG port allows In-System Programming (ISP) of a completely blank DSM2180F3 device sol-
dered to the board with no involvement of the DSP, which is ideal for first time programming during man-
ufacturing. Subsequent field updates can also be done via this interface.
This application note addresses the ease of interfacing the DSM2180F3 with the ADSP-2185 DSP. Famil-
iarity with the DSM2180F3 is assumed. Please see the DSM2180F3 data sheet for a detailed description
of the device.
DSM2180F3 ARCHITECTURE
Figure 1 is a block diagram of the DSM2180F3.
Figure 1. DSM2180F3 Block Diagram
On-chip features supply the key elements to implement a two-chip DSP System. Flash DSM features in-
clude:
2/17
Glueless connection to DSP: easily add memory, logic, and I/O to DSP.
CONTROL
ADDR
DSP
DSP
CNTL0
CNTL1
CNTL2
PD0
PD1
PD2
RST\
AD10
AD11
AD12
AD13
AD14
AD15
SECURITY
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
PC2
PC7
LOCK
PIN FEEDBACK
NODE FEEDBACK
INTERNAL ADDR, DATA, CONTROL BUS LINKED TO DSP
CHIP SELECTS
COMPLEX PLD
DECODE PLD
EXTERNAL
PAGE REG
(DPLD)
(CPLD)
ARRAY
AND
16 OUTPUT MICRO<>CELLS
EXTERNAL CHIP SELECTS, ESC0-2
CSIOP
B
C C C
3 OPTIONAL OUTPUTS TO PORT D
FS0-7
B
B
C
B
C
B B
B
MICRO<>CELLS
B
B
C
16 INPUT
B
C
fs0
B B
B
C
fs1
fs2
POWER MANAGEMENT
8 SEGMENTS, 16 KB
fs3
CSIOP REGISTER
fs4
128 KBytes TOTAL
fs5
C
RUNTIME CONTROL
B
B
C
fs6
FLASH MEMORY
fs7
B
C
C
B B B
B
B
C
B
C
C
B
B
C
TO ALL AREAS
JTAG-ISP
OF CHIP
CATOR
ALLO-
DSP SYSTEM
DSM2180F3
MEMORY
I/O PORT
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
I/O PORT
PC0
PC1
PC3
PC4
PC5
PC6
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
AI04951
DATA
DSP