ADSP-BF504 Datasheet, PDF (38/80 Pages) Analog Devices – Blackfin Embedded Processor

ADSP-BF504/F, ADSP-BF506F
Preliminary Technical Data
Serial Ports
Table 28 through Table 31 on Page 40 and Figure 18 on Page 39
through Figure 20 on Page 40 describe serial port operations.
Table 28. Serial Ports—External Clock
Parameter
Min
V_DDEXT = 1.8 V
Max
Timing Requirements
t_SFSE
TFSx/RFSx Setup Before TSCLKx/RSCLKx¹
3.0
t_HFSE
TFSx/RFSx Hold After TSCLKx/RSCLKx¹
3.0
t_SDRE
Receive Data Setup Before RSCLKx^1,2
3.0
t_HDRE
Receive Data Hold After RSCLKx^1,2
3.6
t_SCLKEW
TSCLKx/RSCLKx Width
5.4
t_SCLKE
TSCLKx/RSCLKx Period
18.0
Switching Characteristics
t_DFSE
TFSx/RFSx Delay After TSCLKx/RSCLKx
12.5
(Internally Generated TFSx/RFSx)³
t_HOFSE
TFSx/RFSx Hold After TSCLKx/RSCLKx
0.0
(Internally Generated TFSx/RFSx)³
t_DDTE
Transmit Data Delay After TSCLKx³
t_HDTE
Transmit Data Hold After TSCLKx³
12.5
0.0
1 _{Referenced to sample edge.}
2 _{When SPORT is used in conjunction with the ACM, refer to the timing requirements in Table 39 (ACM Timing).}
3 _{Referenced to drive edge.}
Table 29. Serial Ports—Internal Clock
Parameter
Min
V_DDEXT = 1.8 V
Max
Timing Requirements
t_SFSI
TFSx/RFSx Setup Before TSCLKx/RSCLKx¹
12.4
t_HFSI
TFSx/RFSx Hold After TSCLKx/RSCLKx¹
–1.5
t_SDRI
Receive Data Setup Before RSCLKx^1,2
12.4
t_HDRI
Receive Data Hold After RSCLKx^1,2
–1.5
Switching Characteristics
t_SCLKIW
t_SCLKI
t_DFSI
TSCLKx/RSCLKx Width
TSCLKx/RSCLKx Period
TFSx/RFSx Delay After TSCLKx/RSCLKx
(Internally Generated TFSx/RFSx)³
5.4
18.0
3.0
t_HOFSI
TFSx/RFSx Hold After TSCLKx/RSCLKx
–4.0
(Internally Generated TFSx/RFSx)³
t_DDTI
Transmit Data Delay After TSCLKx³
t_HDTI
Transmit Data Hold After TSCLKx³
3.0
–1.8
1 _{Referenced to sample edge.}
2 _{When SPORT is used in conjunction with the ACM, refer to the timing requirements in Table 39 (ACM Timing).}
3 _{Referenced to drive edge.}
V_DDEXT = 2.5/3.3 V
Min
Max
3.0
3.0
3.0
3.6
5.4
18.0
12.0
0.0
12.0
0.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V_DDEXT = 2.5/3.3 V
Min
Max
11.3
–1.5
11.3
–1.5
5.4
18.0
3.0
–4.0
3.0
–1.8
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Rev. PrC | Page 38 of 80 | January 2010