HD6432138SW datasheet(128/1061 Pages) RENESAS

128 / 1061 page

Section 3 MCU Operating Modes

Rev. 4.00 Jun 06, 2006 page 74 of 1004

REJ09B0301-0400

Bit 6—IOS Enable (IOSE): Controls the function of the

AS/IOS pin in expanded mode.

Bit 6

IOSE

Description

The

AS/IOS pin functions as the address strobe pin (AS)

(Low output when accessing an external area)

(Initial value)

The

AS/IOS pin functions as the I/O strobe pin (IOS)

(Low output when accessing a specified address from H'(FF)F000 to H'(FF)FE4F)*

Note:

In the H8S/2138 F-ZTAT A-mask version, the address range is from H'(FF)F000 to

H'(FF)F7FF.

Bit 3—External Reset (XRST): Indicates the reset source. When the watchdog timer is used, a

reset can be generated by watchdog timer overflow as well as by external reset input. XRST is a

read-only bit. It is set to 1 by an external reset and cleared to 0 by watchdog timer overflow.

Bit 3

XRST

Description

A reset is generated by watchdog timer overflow

A reset is generated by an external reset

(Initial value)

Bit 1—Host Interface Enable (HIE): This bit controls CPU access to the host interface data

registers and control registers (HICR, IDR1, ODR1, STR1, IDR2, ODR2, and STR2), the

keyboard controller and MOS input pull-up control registers (KMIMR and KMPCR), the 8-bit

timer (channel X and Y) data registers and control registers (TCRX/TCRY, TCSRX/TCSRY,

TICRR/TCORAY, TICRF/TCORBY, TCNTX/TCNTY, TCORC/TISR, TCORAX, and

TCORBX), and the timer connection control registers (TCONRI, TCONRO, TCONRS, and

SEDGR).

Bit 1

HIE

Description

In areas H'(FF)FFF0 to H'(FF)FFF7 and H'(FF)FFFC to H'(FF)FFFF, CPU access to 8-

bit timer (channel X and Y) data registers and control registers, and timer connection

control registers, is permitted

(Initial value)

In areas H'(FF)FFF0 to H'(FF)FFF7 and H'(FF)FFFC to H'(FF)FFFF, CPU access to

host interface data registers and control registers, and keyboard controller and MOS

input pull-up control registers, is permitted

HD6432138SW Datasheet(PDF) 128 Page - Renesas Technology Corp

HD6432138SW Datasheet(HTML) 128 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL