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H838024 Datasheet(PDF) 99 Page - Renesas Technology Corp

Part # H838024
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

H838024 Datasheet(HTML) 99 Page - Renesas Technology Corp

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Section 2 CPU
Rev. 7.00 Mar 10, 2005 page 57 of 652
REJ09B0042-0700
Three-state access to on-chip peripheral modules
T1 state
Bus cycle
Internal
address bus
Internal
read signal
Internal
data bus
(read access)
Internal
write signal
Read data
Address
Internal
data bus
(write access)
T2 state
T3 state
Write data
φ or φSUB
Figure 2.13 On-Chip Peripheral Module Access Cycle (3-State Access)
2.7
CPU States
2.7.1
Overview
There are four CPU states: the reset state, program execution state, program halt state, and
exception-handling state. The program execution state includes active (high-speed or medium-
speed) mode and subactive mode. In the program halt state there are a sleep (high-speed or
medium-speed) mode, standby mode, watch mode, and sub-sleep mode. These states are shown in
figure 2.14. Figure 2.15 shows the state transitions.



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