msm7630 Oki Semiconductor, msm7630 Datasheet - Page 56

• Manufacturer Part Number: msm7630
• Description: Universal Speech Processor
• Manufacturer: Oki Semiconductor

¡ Semiconductor
• bit[12:11] SZ: Device Size (read/write)
• bit[10] RFM: Refresh Mode (read/write)
• bit[9:0] RFC: Refresh Counter (read/write)
These bits set the device size of DRAM space.
These bits will be "00" after reset. When this field is "00", attempting to access DRAM space will
cause an instruction access exception or data access exception.
This bit sets the refresh operation mode.
This bit will be "0" after reset.
These bits set the initial value of the refresh counter. It should be set as an integer value obtained
by:
[(refresh period)
These bits will be "0000000000" after reset.
SZ = 00
SZ = 01
SZ = 10
SZ = 11
RFM = 0
RFM = 1
(clock period)
No DRAM (space is invalid)
8-bit wide device
16-bit wide device
32-bit wide device
CAS-before-RAS refresh
CAS-before-RAS self-refresh
16] – 1
MSM7630
56/95