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HD64F2149YV Folha de dados(PDF) 990 Page - Renesas Technology Corp

Nome de Peças HD64F2149YV
Descrição Electrónicos  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
PDF  1075 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F2149YV Folha de dados(HTML) 990 Page - Renesas Technology Corp

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Appendix B Internal I/O Registers
Rev. 3.00 Jan 18, 2006 page 962 of 1044
REJ09B0280-0300
SYSCR—System Control Register
H'FFC4
System
7
CS2E
0
R/W
6
IOSE
0
R/W
5
INTM1
0
R
4
INTM0
0
R/W
3
XRST
1
R
0
RAME
1
R/W
2
NMIEG
0
R/W
1
HIE
0
R/W
Bit
Initial value
Read/Write
RAM Enable
0
On-chip RAM is disabled
1
On-chip RAM is enabled
Host interface enable
0
Addresses H'(FF)FFF0 to H'(FF)FFF7
and H'(FF)FFFC to H'(FF)FFFF are
used for access to 8-bit timer (channel
X and Y) data registers and control
registers, and timer connection
control registers
1
Addresses H'(FF)FFF0 to H'(FF)FFF7
and H'(FF)FFFC to H'(FF)FFFF are
used for access to host interface data
registers and control registers, and
keyboard controller and MOS input
pull-up control registers
NMI edge select
0
Falling edge
1
Rising edge
External reset
0
Reset generated by watchdog timer overflow
1
Reset generated by an external reset
Interrupt control selection mode 1 and 0
INTM1
Bit 5
Interrupts controlled by I bit
(Initial value)
Interrupts controlled by I and UI bits, and ICR
Cannot be used in the LSI
Cannot be used in the LSI
INTM0
Bit 4
Interrupt
control mode
Description
0
1
00
1
2
3
1
0
1
CS2 enable
0
CS2 pin function halted
(
CS2 fixed high internally)
0
CS2E
FGA20E
1
1
CS2 pin function selected for P81/CS2 pin
0
CS2 pin function selected for P90/ECS2 pin
1
Description
SYSCR
Bit 7
HICR
Bit 0
IOS enable
0
The
AS/IOS pin functions as the address strobe pin
(Low output when accessing an external area)
1
The
AS/IOS pin functions as the I/O strobe pin
(Low output when accessing a specified address from H'(FF)F000 to H'(FF)F7FF)



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