SH7720 Datasheet, PDF (1057/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 30 SIM Card Module (SIM)
30.3.6 Serial Status Register (SCSSR)
SCSSR is an 8-bit readable/writable register that indicates the operating state of the smart card
interface.
Initial
Bit Bit Name Value R/W Description
7
TDRE
1
R/W Transmit Data Register Empty
Indicates that data was transferred from the transmit data
register (SCTDR) to the transmit shift register (SCTSR),
and that the next serial transmit data can be written to
SCTDR.
0: Indicates that valid transmit data is written to SCTDR
[Clearing conditions]
• When the TE bit in CCSCR is 1, and data is written to
SCTDR
• When 0 is written to the TDRE bit
1: Indicates that there is no valid transmit data in SCTDR
[Setting conditions]
• On reset
• When the TE bit in SCSCR is 0
• When data is transferred from SCTDR to SCTSR, and
data can be written to SCTDR
Rev. 3.00 Jan. 18, 2008 Page 995 of 1458
REJ09B0033-0300