HD6417606 RENESAS [Renesas Technology Corp], HD6417606 Datasheet - Page 211

• Manufacturer Part Number: HD6417606
• Manufacturer: RENESAS [Renesas Technology Corp]

Basic Timing for Memory Card Interface: Figure 7.31 shows the basic timing of the PCMCIA
IC memory card interface. If areas 5 and 6 in the physical space are specified as the PCMCIA
interface, accessing the common memory areas in areas 5 and 6 automatically accesses with the IC
memory card interface. If the external bus frequency (CKIO) increases, the setup times and hold
times for the address pins (A25 to A0), card enable signals (CE1A, CE2A, CE1B, CE2B), and
write data (D15 to D0) to the RD and WE signals become insufficient. To prevent this error, this
LSI can specify the setup times and hold times for areas 5 and 6 in the physical space
independently, using CS5BWCR and CS6BWCR. In the PCMCIA interface, as in the normal
space interface, a software wait or hardware wait can be inserted using the WAIT pin. Figure 7.32
shows the PCMCIA memory bus wait timing.
This LSI
D15 to D8
A25 to A0
D7 to D0
ICIOWR
ICIORD
I/O Port
RD/WR
IOIS16
Figure 7.30 Example of PCMCIA Interface Connection
CE1A
CE2A
WAIT
WE
RD
DIR
DIR
G
G
G
G
detection
Card
circuit
Rev. 4.00 Sep. 13, 2007 Page 185 of 502
Section 7 Bus State Controller (BSC)
(memory or I/O)
A25 to A0
D7 to D0
D15 to D8
CE1
CE2
OE
WE/PGM
IORD
IOWR
REG
WAIT
IOIS16
CD1,CD2
PC card
REJ09B0239-0400