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HD64F2149YV 데이터시트(PDF) 293 Page - Renesas Technology Corp

부품명 HD64F2149YV
상세설명  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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Section 8 I/O Ports
Rev. 3.00 Jan 18, 2006 page 265 of 1044
REJ09B0280-0300
8.12.4
MOS Input Pull-Up Function
Port B has a built-in MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used in modes 1 to 3 (EXPE = 1) with the ABW bit in WSCR set to
1, and in modes 2 and 3 (EXPE = 0), and can be specified as on or off on a bit-by-bit basis.
When a PBDDR bit is cleared to 0, setting the corresponding PBODR bit to 1 turns on the MOS
input pull-up for that pin. When a pin is designated as an on-chip supporting module output pin,
the MOS input pull-up is always off.
The MOS input pull-up function is in the off state after a reset and in hardware standby mode. The
prior state is retained in software standby mode.
Table 8.25 summarizes the MOS input pull-up states.
Table 8.25
MOS Input Pull-Up States (Port B)
Mode
Reset
Hardware
Standby Mode
Software
Standby Mode
In Other
Operations
1, 2, 3 (EXPE = 1) with
ABW in WSCR = 0
Off
Off
Off
Off
1, 2, 3 (EXPE = 1) with
ABW in WSCR = 1, and
2, 3 (EXPE = 0)
Off
Off
On/Off
On/Off
Legend:
Off:
MOS input pull-up is always off.
On/Off: On when PBDDR = 0 and PBODR = 1; otherwise off.



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