Bdma Port - Analog Devices adsp-2100 Manual

11 DMA Ports
1/2x CLOCK
or
CRYSTAL
SERIAL
DEVICE
SERIAL
DEVICE
SYSTEM
INTERFACE
or
µCONTROLLER
16
Figure 11.1 ADSP-2181 System
11.2
The ADSP-2181's byte memory space is 8 bits wide and can address up to
4M bytes of program code or data. This memory space takes the place of
the boot memory space found on other ADSP-2100 family processors.
Unlike boot memory space, byte memory has read/write access through
the ADSP-2181's BDMA port.
Each read/write to byte memory consists of data (on data bus lines 15:8)
and address (on address bus lines 13:0 plus data lines 23:16). The 22-bit
byte memory address lets you access up to 4M bytes of ROM or RAM.
11 – 2
ADSP-2181
CLKIN
ADDR
XTAL
FL0-2
PF0-7
DATA
IRQ2
IRQE
IRQL0
IRQL1
SPORT 1
SCLK1
RFS1 or IRQ0
TFS1 or IRQ1
DT1 or FO
DR1 or FI
SPORT 0
SCLK0
RFS0
TFS0
DT0
DR0
IDMA PORT
IRD
IWR
IS
IAL
IACK
PWDACK
IAD15-0

BDMA PORT

14
13-0
24
23-0
BMS
IOMS
PMS
DMS
CMS
BR
BG
BGH
PWD
A 13-0
A0-A21
D 23-16
BYTE
MEMORY
D 15-8
DATA
CS
A 10-0
ADDR
I/O SPACE
D 23-8
(PERIPHERALS)
DATA
2048 Locations
CS
A 13-0
ADDR
OVERLAY
D 23-0
MEMORY
DATA
PM Segments
DM Segments
Two 8K
Two 8K