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Rev.1.10 Jul 01, 2005 page 89 of 318
REJ09B0124-0110
M16C/6N Group (M16C/6NK, M16C/6NM) 11. DMAC
Under development
This document is under development and its contents are subject to change.
11.2 DMA Transfer Cycles
Any combination of even or odd transfer read and write addresses is possible.
Table 11.2 shows the number of DMA transfer cycles. Table 11.3 shows the coefficient j, k.
The number of DMAC transfer cycles can be calculated as follows:
No. of transfer cycles per transfer unit = No. of read cycles ✕ j + No. of write cycles ✕ k
Table 11.2 DMA Transfer Cycles
Table 11.3 Coefficient j, k
Transfer Unit Access Address No. of Read Cycles No. of Write Cycles
8-bit Transfer Even 1 1
(DMBIT =1) Odd 1 1
16-bit Transfer Even 1 1
(DMBIT = 0) Odd 2 2
NOTE:
1. Depends on the set value of the PM20 bit in the PM2 register.
Internal ROM, RAM SFR
No Wait With Wait 1 Wait
(1)
2 Waits
(1)
j1223
k1223