Motorola M5271EVB, Руководство пользователя

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1-10 M5271EVB User’s Manual
Support Logic
Table 1-6. SW4-[4:3] Encoded Clock Mode
SW4-3 SW4-4 Clock Mode
OFF OFF External clock mode- (PLL disabled)
OFF ON 1:1 PLL
ON OFF Normal PLL mode with external clock reference
ON ON Normal PLL mode w/crystal oscillator reference
Table 1-7. SW4-5 Chip Configuration Mode
SW4-5 RCON (SW4-1) Mode
OFF ON Reserved
ON ON Master
X OFF Master
Table 1-8. SW4-[7:6] Boot Device
SW4-6 SW4-7 RCON (SW4-1) Boot Device
OFF OFF ON External (32-bit)
OFF ON ON External (8-bit)
ON OFF ON External (16-bit)
ON ON ON External (32-bit)
X X OFF External (32-bit)
Table 1-9. SW4-8 Bus Drive Strength
SW4-8 RCON (SW4-1) Drive Strength
OFF ON Partial Bus Drive
ON ON Full Bus Drive
X OFF Partial Bus Drive
Table 1-10. SW4-[10:9] Address/Chip Select Mode
SW4-9 SW4-10 RCON (SW4-1) Mode
OFF OFF ON PF[7:5] = /CS[6:4]
OFF ON ON PF[7] = /CS6, PF[6:5] = A[22:21]
ON OFF ON PF[7:6] = /CS[6:5], PF[5] = A21
ON ON ON PF[7:5] = A[23:21]
X X OFF PF[7:5] = A[23:21]