Renesas ZTAT H8S/2357F, Hardware Manual

Page: 551 / 1047

Rev.6.00 Oct.28.2004 page 523 of 1016
REJ09B0138-0600H
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 to be fixed high or low.
SCMR SMR SCR Setting
SMIF C/
A
, GM CKE1 CKE0 SCK Pin Function
0 See the SCI
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