M5M410092BRF Datasheet, PDF (73/204 Pages) Mitsubishi Electric Semiconductor – 3D-RAM (M5M410092B)

MITSUBISHI
ELECTRONIC DEVICE GROUP
Rev. 1.03
3D-RAM (M5M410092B)
Register Operations
There are fourteen registers in the 3D-RAM.
Their encoding is shown in Table 3.14. Among
these registers, the Identification Register is
read-only, and all other registers are write-only.
All registers are 32 bits wide except the Constant
Source register, which is 36 bits. The write-only
registers are loaded from the PALU_DQ_[31:0]. In
the case of the 36-bit Constant Source register,
the PALU_DX_[3:0] pins specify the most
significant four bits. The operations launched in
the previous cycles are never affected by the
current register load. The operations launched in
the following cycles are always affected by the
register load. The PALU_BE_[3..0] pins apply to all
register read and write operations. PALU_BE₀
enables writes to bits 7 through 0; PALU_BE₁
enables writes to bits 15 through 8; PALU_BE₂
enables writes to bits 23 through 16; PALU_BE₃
enables writes to bits 31 through 24. Finally,
during the Stateful Data Write modes, all bits in
these registers are fully effective; during the
Stateless Data Write modes, all register bits are
ignored except that the Color Depth Select
register, the bits controlling the Picking Logic,
and the Stencil Control register maintain some of
their special functions. Please refer to the
description of these bits for more details.
Table 3.14 Register address encoding
PALU_A
Register
Mnemonic Type
Reset Value Stateless Mode
000 000 Plane Mask
PM
Write Only FFFF FFFFh not applicable
000 001 Constant Source
CSR
Write Only 0 0000 0000h not applicable
000 010 Match Mask
MatMask Write Only 0000 0000h not applicable
000 011 Magnitude Mask
MagMask Write Only 0000 0000h not applicable
000 100 ROP/Blend Control
RBC
Write Only 0303 0303h
0303 0303h
000 101 Compare Control
CCR
Write Only 0A00 0000h
0000 0000h
000 110 Write Address Control
WAC
Write Only 0000 0000h
0000 0000h
000 111 Identification*
ID
Read Only 0130 A039h not applicable
001 000 Blend_2 Control (NEW)
BLD2 Write Only 0000 0000h
0000 0000h
001 001 Preblend Control (NEW)
PBC
Write Only 0000 0000h
0000 0000h
001 010 Stencil Planes (NEW)
StP
Write Only 00FF 0000h
00FF 0000h
001 011 Stencil Control (NEW)
StC
Write Only 3330 0000h
3330 0000h
001 110 PASS_INs Select (NEW)
PINS Write Only 0000 0100h not applicable
001 111 Color Depth Select (NEW)
CDS
Write Only 0000 0000h programmed value
*Note: Reset value for Identification register is for Version 0
57