H8SLASH3028F datasheet(460/923 Pages) RENESAS

460 / 923 page

Rev. 2.00, 09/03, page 430 of 890

Example of Normal TPC Output (Example of Five-Phase Pulse Output): Figure 11.5 shows

an example in which the TPC is used for cyclic five-phase pulse output.

GRA

H'0000

NDRB

PBDR

TP15

TP14

TP13

TP12

TP11

•

Time

TCNT

TCNT value

Compare match

The 16-bit timer channel to be used as the output trigger channel is set up so that GRA is an output

compare register and the counter will be cleared by compare match A. The trigger period is set in GRA.

The IMIEA bit is set to 1 in TIER to enable the compare match A interrupt.

H'F8 is written in PBDDR and NDERB, and bits G3CMS1, G3CMS0, G2CMS1, and G2CMS0 are set in

TPCR to select compare match in the 16-bit timer channel set up in step 1 as the output trigger.

Output data H'80 is written in NDRB.

The timer counter in this 16-bit timer channel is started. When compare match A occurs, the NDRB

contents are transferred to PBDR and output. The compare match/input capture A (IMFA) interrupt

service routine writes the next output data (H'C0) in NDRB.

Five-phase overlapping pulse output (one or two phases active at a time) can be obtained by writing

H'40, H'60, H'20, H'30, H'10, H'18, H'08, H'88… at successive IMFA interrupts. If the DMAC is set for

activation by this interrupt, pulse output can be obtained without loading the CPU.

Figure 11.5 Normal TPC Output Example (Five-Phase Pulse Output)

H8/3028F Datasheet(PDF) 460 Page - Renesas Technology Corp