R32V2020 Micro-Code
Revision as of 13:01, 10 April 2022 by Blwikiadmin (talk | contribs) (Created page with "== R32V2020 Microcode == * Each R32V2020 instruction executes 4 clocks of microcode * Slots are w_OneHotState[0..3] * 50 MHz clock rate * 4 clocks = 12.5 MIPS === Bottleneck...")
R32V2020 Microcode
- Each R32V2020 instruction executes 4 clocks of microcode
- Slots are w_OneHotState[0..3]
- 50 MHz clock rate
- 4 clocks = 12.5 MIPS
Bottleneck
- Pull from stack operation is the bottleneck
- Due to pre-decrement
Signals asserted during w_OneHotState[]
- w_OneHotState[0]
- o_clkInstrRomAddr
- increment CPU cycle counter
- w_OneHotState[1]
- i_Op_PULL
- w_OneHotState[2]
- w_holdHaltCatchFire
- o_writeStackRamEn
- o_writeToDataRamEnable
- w_OneHotState[3]
- i_wrRegFile
- o_peripheralRdStrobe
- o_peripheralWrStrobe
- i_save_CCR_bits
- i_Op_PUSH
- i_OP_BSR
- i_Op_LPBP
- i_Op_SPBP
- i_Op_LPSP
- i_Op_SPSP
- i_Op_LPLP
- i_Op_SPLP
- i_Op_LDBP
- i_Op_SDBP
- i_Op_LDSP
- i_Op_SDSP
- i_Op_LDLP
- i_Op_SDLP
- Load Program Counter (pull PC)
