HD6433044 Datasheet, PDF (518/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

14.3.4 Register Settings
Table 14-3 shows a bit map of the registers used in the smart card interface. Bits indicated as 0 or
1 should always be set to the indicated value. The settings of the other bits will be described in
this section.
Table 14-3 Register Settings in Smart Card Interface
Register Address*¹ Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2
SMR
H'FFB0
GM 0
1
O/E 1
0
BRR
H'FFB1
BRR7 BRR6 BRR5 BRR4 BRR3 BRR2
SCR
H'FFB2
TIE RIE TE
RE
0
0
TDR
H'FFB3
TDR7 TDR6 TDR5 TDR4 TDR3 TDR2
SSR
H'FFB4
TDRE RDRF ORER ERS PER TEND
RDR
H'FFB5
RDR7 RDR6 RDR5 RDR4 RDR3 RDR2
SCMR
H'FFB6
—
—
—
—
SDIR SINV
Notes: — Unused bit.
1. Lower 16 bits of the address.
2. When the GM of the SMR is set at 0, be sure the CKE1 bit is 0.
Bit 1 Bit 0
CKS1 CKS0
BRR1 BRR0
CKE1*² CKE0
TDR1 TDR0
0
0
RDR1 RDR0
—
SMIF
Serial Mode Register (SMR) Settings: In regular smart card interface mode, set the GM bit at 0.
In regular smart card mode, clear the GM bit to 0. In GSM mode, set the GM bit to 1. Clear the
O/E bit to 0 if the smart card uses the direct convention. Set the O/E bit to 1 if the smart card uses
the inverse convention. Bits CKS1 and CKS0 select the clock source of the built-in baud rate
generator. See section 14.3.5, Clock.
Bit Rate Register (BRR) Settings: This register sets the bit rate. Equations for calculating the
setting are given in section 14.3.5, Clock.
Serial Control Register (SCR): The TIE, RIE, TE, and RE bits have their normal serial
communication functions. For details, see section 13, Serial Communication Interface. The CKE1
and CKE0 bits select clock output. When the GM bit of the SMR is cleared to 0, to disable clock
output, clear this bit to 00. To enable clock output, set this bit to 01. When the GM bit of the SMR
is set to 1, clock output is enabled. Clock output is fixed at high or low.
Smart Card Mode Register (SCMR): If the smart card follows the direct convention, clear the
SDIR and SINV bits to 0. If the smart card follows the indirect convention, set the SDIR and
SINV bits to 1. To use the smart card interface, set the SMIF bit to 1.
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