SH7211 Datasheet, PDF (609/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Section 10 Multi-Function Timer Pulse Unit 2 (MTU2)
(17) Operation when Error Occurs during Phase Counting Mode Operation, and Operation
is Restarted in Normal Mode
Figure 10.151 shows an explanatory diagram of the case where an error occurs in phase counting
mode and operation is restarted in normal mode after re-setting.
1
2
RESET TMDR
(PCM)
3
4
5
TIOR PFC TSTR
(1 init (MTU2) (1)
0 out)
6
Match
7
8
9
10 11 12 13
Error PFC TSTR TMDR TIOR PFC TSTR
occurs (PORT) (0) (normal) (1 init (MTU2) (1)
0 out)
MTU2 module output
TIOC*A
TIOC*B
Port output
PEn
High-Z
PEn
High-Z
n = 0 to 15
Figure 10.151 Error Occurrence in Phase Counting Mode, Recovery in Normal Mode
1. After a reset, MTU2 output is low and ports are in the high-impedance state.
2. Set phase counting mode.
3. Initialize the pins with TIOR. (The example shows initial high output, with low output on
compare-match occurrence.)
4. Set MTU2 output with the PFC.
5. The count operation is started by TSTR.
6. Output goes low on compare-match occurrence.
7. An error occurs.
8. Set port output with the PFC and output the inverse of the active level.
9. The count operation is stopped by TSTR.
10. Set in normal mode.
11. Initialize the pins with TIOR.
12. Set MTU2 output with the PFC.
13. Operation is restarted by TSTR.
Rev. 2.00 May. 08, 2008 Page 585 of 1200
REJ09B0344-0200