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H8S2245 датащи(PDF) 193 Page - Renesas Technology Corp

номер детали H8S2245
подробное описание детали  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S2245 датащи(HTML) 193 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev.3.00 Mar. 26, 2007 Page 151 of 772
REJ09B0355-0300
6.4.1
On-Chip Memory (ROM, RAM) Access Timing
On-chip memory is accessed in one state. The data bus is 16 bits wide, permitting both byte and
word transfer instruction. Figure 6.4 shows the on-chip memory access cycle. Figure 6.5 shows the
pin states.
T1
φ
Internal address bus
Bus cycle
Address
Read data
Write data
Internal read signal
Internal data bus
Internal write signal
Internal data bus
Read
access
Write
access
Figure 6.4 On-Chip Memory Access Cycle
Bus cycle
T1
Unchanged
Address bus
AS
RD
HWR, LWR
Data bus
φ
High
High
High
High-impedance state
Figure 6.5 Pin States during On-Chip Memory Access



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