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Table 22.1 Pin Functions (cont)
Pin
No.
No.
Pin Name
248 A1
EXTAL
249 C5
NC
250 D16
NC
251 H17
NC
252 H18
NC
253 N3
NC
254 N4
NC
255 U4
NC
256 V18
NC
I:
Input
O:
Output
I/O:
Input/output
Power: Power supply
Notes: 1. The VDDQ (3.3. V), VSSQ, VDD (1.8 V), and VSS pins must all be connected to the
system power supply, and power must be supplied continuously. Even if only the RTC
is operating (in standby mode), power must be supplied to all VDDQ, VSSQ, VDD, and
VSS pins, in the same way as for VDD-RTC and VSS-RTC.
2. Power must be supplied to VDD-PLL1/2 and VSS-PLL1/2 regardless of whether or not
the on-chip PLL circuits are used.
3. Power must be supplied to VDD-CPG and VSS-CPG regardless of whether or not the
on-chip crystal resonator is used.
4. Power must be supplied to VDD-RTC and VSS-RTC regardless of whether or not the
on-chip RTC is used.
5. VSSQ, VSS, VSS-RTC, VSS-PLL1/2, and VSS-CPG are connected inside the package.
Rev. 4.0, 04/00, page 724 of 850
I/O
Function
I
External input
clock/crystal
resonator
SRAM
DRAM
Reset
Memory Interface
SDRAM PCMCIA MPX
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