Datasheet

Section 15 Smart Card Interface
Rev.6.00 Sep. 27, 2007 Page 677 of 1268
REJ09B0220-0600
15.2.4 Serial Control Register (SCR)
Bit : 7 6 5 4 3 2 1 0
TIE RIE TE RE MPIE TEIE CKE1 CKE0
Initial value : 0 0 0 0 0 0 0 0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W
In smart card interface mode, the function of bits 1 and 0 of SCR changes when bit 7 of the serial
mode register (SMR) is set to 1.
Bits 7 to 2—Operate in the same way as for the normal SCI. For details, see section 14.2.6, Serial
Control Register (SCR).
Bits 1 and 0—Clock Enable 1 and 0 (CKE1, CKE0): These bits are used to select the SCI clock
source and enable or disable clock output from the SCK pin.
In smart card interface mode, in addition to the normal switching between clock output enabling
and disabling, the clock output can be specified as being fixed high or low.
SCMR SMR SCR Setting
SMIF GM CKE1 CKE0 SCK Pin Function
0 See the SCI specification
1 0 0 0 Operates as port I/O pin
1 0 0 1 Outputs clock as SCK output pin
1 1 0 0 Operates as SCK output pin, with output fixed
low
1 1 0 1 Outputs clock as SCK output pin
1 1 1 0 Operates as SCK output pin, with output fixed
high
1 1 1 1 Outputs clock as SCK output pin