uPSD3212A, uPSD3212C, uPSD3212CV
142/163
Figure 72. External Data Memory READ CycleTable 118. External Clock Drive (with the 5V MCU Module)
Note: 1. Conditions (in addition to those in Table 109., page133, VCC = 4.5 to 5.5V ): VSS = 0V; CL for Port 0, ALE an d PSEN o utput is 100p F;
CL for other outputs is 80pF
Table 119. External Clock Drive (with the 3V MCU Module)
Note: 1. Conditions (in addition to those in Table 110., page133, VCC = 3.0 to 3.6V ): VSS = 0V; CL for Port 0, ALE an d PSEN o utput is 100p F,
for 5V devices, and 50pF for 3V devices; CL for othe r outputs is 80pF, for 5V devices, and 50pF for 3V devices)
Symbol Parameter(1) 40MHz Oscillato r Variable Oscillator
1/tCLCL = 24 to 40MHz Unit
Min Max Min Max
tRLRH Oscillator period 25 41.7 ns
tWLWH High time 10 tCLCL – tCLCX ns
tLLAX2 Low time 10 tCLCL – tCLCX ns
tRHDX Rise time 10 ns
tRHDX Fall time 10 ns
Symbol Parameter(1) 24MHz Oscillato r Variable Oscillator
1/tCLCL = 8 to 24MHz Unit
Min Max Min Max
tRLRH Oscillator period 41.7 125 ns
tWLWH High time 12 tCLCL – tCLCX ns
tLLAX2 Low time 12 tCLCL – tCLCX ns
tRHDX Rise time 12 ns
tRHDX Fall time 12 ns
PORT 2
PORT 0
ALE
RD
PSEN
P2.0 to P2.3 or A8-A11 from DPH A8-A11 from PCH
tAVDV
tRLDV
tLLWL tRLRH
tAVLL
tLLDV
tLHLL
tRLAZ
DATA IN A0-A7 from PCL INSTR IN
A0-A7 from
RI or DPL
tLLAX2
tAVWL
tRHDZ
tWHLH
AI07088
tRHDX