adsp-21060lc Analog Devices, Inc., adsp-21060lc Datasheet - Page 34

• Manufacturer Part Number: adsp-21060lc
• Description: Sharc Processor
• Manufacturer: Analog Devices, Inc.

ADSP-21060/ADSP-21060L/ADSP-21062/ADSP-21062L/ADSP-21060C/ADSP-21060LC
Three-State Timing—Bus Master/ Bus Slave
These specifications show how the memory interface is disabled
(stops driving) or enabled (resumes driving) relative to CLKIN
and the SBTS pin. This timing is applicable to bus master transi-
tion cycles (BTC) and host transition cycles (HTC) as well as the
SBTS pin.
Table 21. Three-State Timing—Bus Master, Bus Slave
1
2
3
4
5
Parameter
Timing Requirements
t
t
Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
For ADSP-21060L/ADSP-21060LC/ADSP-21062L, specification is –1.25 – DT/8 ns min, for ADSP-21062, specification is –1 – DT/8 ns min.
Strobes = RD, WR, PAGE, DMAG, BMS, SW.
For ADSP-21060LC, specification is 0.25 – DT/4 ns max.
In addition to bus master transition cycles, these specs also apply to bus master and bus slave synchronous read/write.
Memory Interface = Address, RD, WR, MSx, SW, PAGE, DMAGx, and BMS (in EPROM boot mode).
STSCK
HTSCK
MIENA
MIENS
MIENHG
MITRA
MITRS
MITRHG
DATEN
DATTR
ACKEN
ACKTR
ADCEN
ADCTR
MTRHBG
MENHBG
INTERFACE
MEMORY
HBG
SBTS Setup Before CLKIN
SBTS Hold Before CLKIN
Address/Select Enable After CLKIN
Strobes Enable After CLKIN
HBG Enable After CLKIN
Address/Select Disable After CLKIN
Strobes Disable After CLKIN
HBG Disable After CLKIN
Data Enable After CLKIN
Data Disable After CLKIN
ACK Enable After CLKIN
ACK Disable After CLKIN
ADRCLK Enable After CLKIN
ADRCLK Disable After CLKIN
Memory Interface Disable Before HBG Low
Memory Interface Enable After HBG High
MEMORY INTERFACE = ADDRESS, RD, WR, MSx, SW, PAGE, DMAGx. BMS (IN EPROM BOOT MODE)
Figure 21. Three-State Timing (Bus Transition Cycle, SBTS Assertion)
t
MENHBG
4
4
4
4
2
2
Rev. F | Page 34 of 64 | March 2008
1
3
5
5
12 + DT/2
Min
–1.5 – DT/8
–1.5 – DT/8
–1.5 – DT/8
9 + 5DT/16
0 – DT/8
7.5 + DT/4
–1 – DT/8
–2 – DT/8
0 + DT/8
19 + DT
5 V and 3.3 V
Max
6 + DT/2
0 – DT/4
1.5 – DT/4
2.0 – DT/4
7 – DT/8
6 – DT/8
8 – DT/4
t
MTRHBG
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns