adsp-21161n Analog Devices, Inc., adsp-21161n Datasheet - Page 29

• Manufacturer Part Number: adsp-21161n
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

Synchronous Read/Write – Bus Master
Use these specifications for interfacing to external memory
systems that require CLKIN, relative to timing or for accessing
a slave ADSP-21161N (in multiprocessor memory space). When
accessing a slave ADSP-21161N, these switching characteristics
Table 17. Synchronous Read/Write – Bus Master
REV. A
Parameter
Timing Requirements
t
t
t
t
Switching Characteristics
t
t
t
t
t
t
t
SSDATI
HSDATI
SACKC
HACKC
DADDO
HADDO
DRDO
DWRO
DRWL
DDATO
HDATO
WRITE CYCLE
READ CYCLE
ACK
RD
DATA
WR
DATA (OUT)
CLKIN
MSx,
(IN)
ADDRESS
(IN)
BRST
Data Setup Before CLKIN
Data Hold After CLKIN
ACK Setup Before CLKIN
ACK Hold After CLKIN
Address, MSx, BMS, BRST, Delay After CLKIN
Address, MSx, BMS, BRST, Hold After CLKIN
RD High Delay After CLKIN
WR High Delay After CLKIN
RD/WR Low Delay After CLKIN
Data Delay After CLKIN
Data Hold After CLKIN
Figure 22. Synchronous Read/Write – Bus Master
t
DDATO
t
DADDO
t
t
DRWL
DRWL
–29–
must meet the slave's timing requirements for synchronous
read/writes (see
Page
master) timing requirements for data and acknowledge setup and
hold times.
30). The slave ADSP-21161N must also meet these (bus
Min
5.5
1
0.5t
1
1.5
0.25t
0.25t
0.25t
1.5
t
SACKC
Synchronous Read/Write – Bus Slave on
CCLK
CCLK
CCLK
CCLK
t
SSDATI
t
+3
HADDO
–1
–1
–1
t
t
Max
10
0.25t
0.25t
0.25t
12.5
DRDO
DWRO
ADSP-21161N
t
HACKC
t
t
HSDATI
HDATO
CCLK
CCLK
CCLK
+9
+9
+9
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns