Section 18 User Debug Interface (H-UDI)
Rev. 2.00 Mar 09, 2006 page 772 of 906
REJ09B0292-0200
18.4.2
H-UDI Interrupt and Serial Transfer
When an H-UDI interrupt instruction is transferred to SDIR via TDI, an interrupt is generated.
Data transfer can be controlled by means of the H-UDI interrupt service routine. Transfer can be
performed by means of SDDR.
Control of data input/output between an external device and the H-UDI is performed by
monitoring the SDTRF bit in SDSR externally and internally. Internal SDTRF bit monitoring is
carried out by having SDSR read by the CPU.
The H-UDI interrupt and serial transfer procedure is as follows.
1. An instruction is input to SDIR by serial transfer, and an H-UDI interrupt request is generated.
2. After the H-UDI interrupt request is issued, the SDTRF bit in SDSR is monitored externally.
After output of SDTRF = 1 from TDO is observed, serial data is transferred to SDDR.
3. On completion of the serial transfer to SDDR, the SDTRF bit is cleared to 0, and SDDR can be
accessed by the CPU. After SDDR has been accessed, SDDR serial transfer is enabled by
setting the SDTRF bit to 1 in SDSR.
4.
Serial data transfer between an external device and the H-UDI can be carried out by
constantly monitoring the SDTRF bit in SDSR externally and internally.
Figures 18.3, 18.4, and 18.5 show the timing of data transfer between an external device and the
H-UDI.
Содержание SH7616
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Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...