h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 547
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h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 547 of 1165
- Download datasheet (6Mb)
Bits CKE1 and CKE0 specify the clock output. When the GM bit in SMR is cleared to 0, set these
bits to B'00 if a clock is not to be output, or to B'01 if a clock is to be output. When the GM bit in
SMR is set to 1, clock output is performed. The clock output can also be fixed high or low.
Smart Card Mode Register (SCMR) Setting: The SDIR bit is cleared to 0 if the IC card is of the
direct convention type, and set to 1 if of the inverse convention type.
The SINV bit is cleared to 0 if the IC card is of the direct convention type, and set to 1 if of the
inverse convention type.
The SMIF bit is set to 1 in the case of the Smart Card interface.
Examples of register settings and the waveform of the start character are shown below for the two
types of IC card (direct convention and inverse convention).
• Direct convention (SDIR = SINV = O/E = 0)
• Inverse convention (SDIR = SINV = O/E = 1)
With the direct convention type, the logic 1 level corresponds to state Z and the logic 0 level to
state A, and transfer is performed in LSB-first order. The start character data above is H'3B.
The parity bit is 1 since even parity is stipulated for the Smart Card.
With the inverse convention type, the logic 1 level corresponds to state A and the logic 0 level
to state Z, and transfer is performed in MSB-first order. The start character data above is H'3F.
The parity bit is 0, corresponding to state Z, since even parity is stipulated for the Smart Card.
With the H8S/2646 Group, inversion specified by the SINV bit applies only to the data bits,
D7 to D0. For parity bit inversion, the O/E bit in SMR is set to odd parity mode (the same
applies to both transmission and reception).
(Z)
(Z)
Ds
Ds
A
A
D0
D7
Z
Z
D1
D6
Z
Z
D2
D5
A
A
D3
D4
Z
A
D4
D3
Z
A
D5
D2
A
Z
Rev. 5.00 Sep 22, 2005 page 521 of 1136
D6
D1
A
A
Section 14 Smart Card Interface
D7
D0
A
A
Dp
Dp
Z
Z
(Z)
(Z)
REJ09B0257-0500
State
State
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