HD6432138SW datasheet(582/1061 Pages) RENESAS

582 / 1061 page

Section 17 Host Interface [H8S/2138 Group]

Rev. 4.00 Jun 06, 2006 page 528 of 1004

REJ09B0301-0400

17.2.2

System Control Register 2 (SYSCR2)

Bit

654

321

KWUL1

KWUL0

P6PUE

—

SDE

CS4E

CS3E

HI12E

Initial value

000

Read/Write

R/W

—

R/W

SYSCR2 is an 8-bit readable/writable register which controls chip operations. Host interface

functions are enabled or disabled by the HI12E bit in SYSCR2. SYSCR2 is initialized to H'00 by a

reset and in hardware standby mode.

Bits 7 and 6—Key Wakeup Level 1 and 0 (KWUL1, KWUL0): The port 6 input level can be

set and changed by software. For details see section 8, I/O Ports.

Bit 5—Port 6 Input Pull-Up Extra (P6PUE): Controls and selects the current specification for

the port 6 MOS input pull-up function connected by means of KMPCR settings. For details see

section 8, I/O Ports.

Bit 4—Reserved: Do not write 1 to this bit.

Bit 3—Shutdown Enable (SDE): Enables or disables the host interface pin shutdown function.

When this function is enabled, host interface pin functions can be halted, and the pins placed in the

high-impedance state, according to the state of the HIFSD pin.

Bit 3

SDE

Description

Host interface pin shutdown function disabled

(Initial value)

Host interface pin shutdown function enabled

Bit 2—CS4 Enable (CS4E): Reserved. Do not write 1 to this bit.

Bit 1—CS3 Enable (CS3E): Reserved. Do not write 1 to this bit.

Bit 0—Host Interface Enable Bit (HI12E): Enables or disables host interface functions in

single-chip mode. When the host interface functions are enabled, slave mode is entered and

processing is performed for data transfer between the slave and host.

HD6432138SW Datasheet(PDF) 582 Page - Renesas Technology Corp

HD6432138SW Datasheet(HTML) 582 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