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H8S2245 데이터시트(PDF) 186 Page - Renesas Technology Corp

부품명 H8S2245
상세설명  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S2245 데이터시트(HTML) 186 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev.3.00 Mar. 26, 2007 Page 144 of 772
REJ09B0355-0300
Bit 5—External Address Enable (EAE): Selects whether addresses H'010000 to H'01FFFF are
to be internal addresses or external addresses.
This setting is invalid in normal mode.
Bit 5
EAE
Description
0
Addresses H'010000 to H'01FFFF are in on-chip ROM (H8S/2246 and H8S/2245) or
a reserved area* (H8S/2244, H8S/2243, H8S/2242, and H8S/2241).
1
Addresses H'010000 to H'01FFFF are external addresses (external expansion mode)
or a reserved area* (single-chip mode).
(Initial value)
Note:
*
Reserved areas should not be accessed.
Bits 4 and 3—Reserved: Only 1 should be written to these bits.
Bit 2—Area Partition Unit Select (ASS): Selects the area partition unit.
Bit 2
ASS
Description
0
Area partition unit is 128 kbytes (1 Mbit)
1
Area partition unit is 2 Mbytes (16 Mbits)
(Initial value)
Bit 1—Reserved: Only 0 should be written to this bit.
Bit 0—WAIT Pin Enable (WAITE): Selects enabling or disabling of wait input by the
WAIT
pin.
Bit 0
WAITE
Description
0
Wait input by
WAIT pin disabled. WAIT pin can be used as I/O port.
(Initial value)
1
Wait input by
WAIT pin enabled



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