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HD64338024 Datasheet(PDF) 98 Page - Renesas Technology Corp

Part # HD64338024
Description  Renesas 8-Bit Single-Chip Microcomputer Super Low Power Series
PDF  697 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64338024 Datasheet(HTML) 98 Page - Renesas Technology Corp

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Section 2 CPU
Rev. 7.00 Mar 10, 2005 page 56 of 652
REJ09B0042-0700
2.6.2
Access to On-Chip Peripheral Modules
On-chip peripheral modules are accessed in two states or three states. The data bus width is 8 bits,
so access is by byte size only. This means that for accessing word data, two instructions must be
used. Figures 2.12 and 2.13 show the on-chip peripheral module access cycle.
Two-state access to on-chip peripheral modules
T1 state
Bus cycle
T2 state
φ or φSUB
Internal address bus
Internal read signal
Internal data bus
(read access)
Internal write signal
Read data
Address
Write data
Internal data bus
(write access)
Figure 2.12 On-Chip Peripheral Module Access Cycle (2-State Access)



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