Freescale Semiconductor MPC8313E PowerQUICC II Pro, User Manual

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PowerQUICC™ MPC8313E Reference Design Board (RDB), Rev. 4
Freescale Semiconductor 39
MPC8313E RDB Board Configuration
configuration word lower (RCWL) and reset configuration word higher (RCWH) and is loaded from the
local bus during the power-on or hard reset flow. The default RCW low bit setting is 0x6204_0000. The
default RCW high bit setting is 0xA060_7800. The RCW is located at the lowest 64 bytes of the boot flash
memory, which is 0xFE00_0000 if the default memory map is used.
Table 18 shows the default RCW in the flash memory.
The RCW definitions are shown in Figure 39 and Figure 40 .
Table 18. Default RCW in Flash Memory
Address
FE000000: 62626262 62626262 04040404 04040404
FE000010: 00000000 00000000 00000000 00000000
FE000020: A0A0A0A0 A0A0A0A0 60606060 60606060
FE000030: 78787878 78787878 00000000 00000000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Field LBCM DDRCM — SPMF — COREPLL
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Field —
Figure 39. Reset Configuration Word Low (RCWL) Bit Settings
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Field PCIHOST — PCIABR — COREDIS BMS BOOTSEQ SWEN ROMLOC RLEXT —
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Field TSEC1M TSEC2M — TLE LALE —
Figure 40. Reset Configuration Word High (RCWH) Bit Settings
Table 19. RCWL Bit Descriptions
Bits Name Meaning Description
0 LBCM Local bus clock mode Local Bus Controller Clock: CSB_CLK
0: Default Ratio 1:1
1 Ratio 2:1
1 DDRCM DDR SDRAM clock
mode DDR Controller Clock: CSB_CLK
0 Ratio 1:1
1: Default Ratio 2:1
2–3 — Reserved Must be set to 10