The SH7305 is comprised of many different peripherals that surround a SH4a core in the SH7305. Due to a lack of known documentation, the peripherals included in the SH7305 are guessed based on similarities to other SuperH CPUs with known documentation.
Please document all reads/writes to unknown peripherals. This is an effort to produce documentation by analyzing their usage. Please report the address, access size in bytes, mark read and/or write, and note what the surrounding code was doing or any hypothesis about the function. Note that 0x8xxxxxxx-0x9xxxxxxx and 0xAxxxxxxx-0xBxxxxxxx addresses are identical, standardize on 0xAxxxxxxx-0xBxxxxxxx addresses.
|A405 0184||2||No||Yes||Writes 0x9554 on cold start. Order for next 3: ...86, ...88, ...8A, ...84. This overlaps with the SH7724's PFC's PULCR (pullup control register), but most likely not the same.|
|A405 0186||2||No||Yes||Writes 0x5555 on cold start. Overlaps with the SH7724's PFC|
|A405 0188||2||No||Yes||Writes 0x5555 on cold start. Overlaps with the SH7724's PFC|
|A405 018A||2||No||Yes||Writes 0x5515 on cold start. Overlaps with the SH7724's PFC|
|A400 0010||4||No|style="background:#9F9;vertical-align:middle;text-align:center;" class="table-yes"|Yes||Writes 4 on cold start|
|A400 001C||4||No|style="background:#9F9;vertical-align:middle;text-align:center;" class="table-yes"|Yes||Writes 0x800 on cold start|
List of peripherals that match documentation
|Name||SH Core||Base Address||Verified||Notes|
|BSC||SH7730||FEC1 0000||No||Assumed to be SH7724 before, register accesses match up with SH7730, maybe others|
|RTC||SH7720||A413 FEC0||Yes||I've tested this, from Simon's docs|
Peripherals on Cold Start
- (SH7724) STBCR <- 0 (Standby control)
- (SH7724) MSTPCR0 <- 0 (module stop 0)
- (SH7724) MSTPCR0 <- 0xFFFFFFFF (module stop 2)