H8SLASH3021 datasheet(424/712 Pages) RENESAS

424 / 712 page

12. Smart Card Interface

Rev.2.00 Mar. 22, 2007 Page 400 of 684

REJ09B0352-0200

12.2.2

Serial Status Register (SSR)

Bit

Initial value

R/W

TDRE

R/(W) *

RDRF

R/(W) *

ORER

R/(W) *

ERS

R/(W) *

PER

R/(W) *

MPBT

R/W

TEND

MPB

Error signal status

Status flag indicating that an

error signal has been received

Transmit end

Status flag indicating

end of transmission

Note: * Only 0 can be written to bits 7 to 3, to clear these flags.

Bit 4 of SSR has a different function in Smart Card interface mode. Coupled with this, the setting

conditions for bit 2, TEND, are also different.

Bits 7 to 5—Operate in the same way as for the normal SCI. For details, see section 11.2.7, Serial

Status Register (SSR).

Bit 4—Error Signal Status (ERS): In Smart Card interface mode, bit 4 indicates the status of the

error signal sent back from the receiving end in transmission. Framing errors are not detected in

Smart Card interface mode.

Bit 4

ERS

Description

Indicates normal data transmission, with no error signal returned

[Clearing conditions]

(Initial value)

Upon reset, in standby mode, or in module stop mode

When 0 is written to ERS after reading ERS = 1

Indicates that the receiving device sent an error signal reporting a parity error

[Setting condition]

When the low level of the error signal is sampled

Note:

Clearing the TE bit in SCR to 0 does not affect the ERS flag, which retains its previous

state.

H8/3021 Datasheet(PDF) 424 Page - Renesas Technology Corp

H8/3021 Datasheet(HTML) 424 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