HD6432621 Hitachi, HD6432621 Datasheet - Page 547

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

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)
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.
Inverse convention (SDIR = SINV = O/E = 1)
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/2626 Series and H8S/2623 Series, 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
D7
D0
Z
Z
D6
D1
Z
Z
D5
D2
A
A
D4
D3
A
Z
D3
D4
A
Z
D2
D5
A
Z
D1
D6
A
A
D0
D7
A
A
Dp
Dp
Z
Z
(Z)
(Z)
State
State
503