SH7730 Datasheet, PDF (1175/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

Appendix
L:
Low level output
Z:
Hi-Z
R: Depends on the pin state or the setting of registers.
K:
Input is fixed; output pins and pull-up/pull-down MOS retain their states.
Notes: 1. Using an external pull-up resistor is safer. The resistance is greater, if the on-chip pull-
up resistance alone is used. Check to ensure that there is no problem with the system.
2. Using an external pull-down resistor is safer. The resistance is greater, if the on-chip
pull-up resistance alone is used. Check to ensure that there is no problem with the
system.
3. Even if this pin is to be used as a port pin, keep the level on it high until it has been
switched to the port function.
4. Set this pin to the high level when an emulator or the H-UDI is not in use, i.e. in stand-
alone usage of the user system.
5. TRST is pulled up inside the chip. A little electric current thus flows while the pin is
externally connected to ground. This current has no effect on the operation of the chip
but does consume power unnecessarily. TRST pull-up can be turned off by the PULCR
register of the PFC. See section 29, Pin Function Controller (PFC) for details.
6. See section 13.7, Notes on Board Design.
7. Connect a pull-up resistor to VccQ (3.3V).
8. Varies according to the state of the TAP controller.
9. Depends on the setting of the CMNCR in BSC. See Table E.2.
Table E.2 Pin States of CKO, CKE, RAS, and CAS pins in Bus Mastership Release Mode
CMNCR
HIZCNT
0
1
CKODRV
0
1
0
1
CKOSTP
0
1
0
1
0
1
0
1
Pin State
CKO
Hi-Z
Output
Low level
Output
Low level
Output
Low level
CKE
Hi-Z
Output
RAS, CAS
Hi-Z
Output
Rev. 1.00 Sep. 19, 2007 Page 1127 of 1136
REJ09B0359-0100