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7.1.2
On-Chip Support Module Access Timing
The on-chip support modules, except for the HCAN, SSU, and realtime input port data register,
are accessed in two states. The data bus is either 8 bits or 16 bits wide, depending on the particular
internal I/O register being accessed. For details, refer to section 22, List of Registers. Figure 7.2
shows access timing for the on-chip peripheral modules.
T1
T2
φ
Internal address bus
Bus cycle
Address
Read data
Write data
Internal read signal
Internal data bus
Internal write signal
Internal data bus
Read
Write
Figure 7.2 On-Chip Support Module Access Cycle
7.1.3
On-Chip HCAN Module Access Timing
On-chip HCAN module access is performed in four states. The data bus width is 16 bits. Wait
states can be inserted by means of a wait request from the HCAN. On-chip HCAN module access
timing is shown in figures 7.3.
T1
T3
T2
T4
Tw
Tw
φ
Internal address bus
Bus cycle
Address
Read data
Write data
HCAN read signal
Internal data bus
HCAN write signal
Internal data bus
Read
Write
Figure 7.3 On-Chip HCAN Module Access Cycle (with Wait States)
Summary of Contents for H8S/2627
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