3069RF-ZTAT Datasheet, PDF (490/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

For smart card interface (SMIF bit in SCMR set to 1): These bits, together with the GM bit in
SMR, determine whether the SCK pin is used for generic input/output or as the serial clock output
pin.
SMR Bit 1 Bit 0
GM CKE1 CKE0 Description
0
0
0
SCK pin available for generic input/output
0
0
1
SCK pin used for clock output
1
0
0
SCK pin output fixed low
1
0
1
SCK pin used for clock output
1
1
0
SCK pin output fixed high
1
1
1
SCK pin used for clock output
(Initial value)
Rev. 5.0, 09/04, page 468 of 978