84PCE:OS:Serial Flash Commands - Revision history

Adriweb: rev M clarificaiton

2019-12-13T20:19:46Z

rev M clarificaiton

Jacobly at 09:35, 30 June 2019

2019-06-30T09:35:35Z

Jacobly: /* Basic Flash Commands */

2019-06-30T09:00:06Z

‎Basic Flash Commands

Jacobly at 08:02, 30 June 2019

2019-06-30T08:02:50Z

Jacobly at 08:02, 30 June 2019

2019-06-30T08:02:19Z

Jacobly: /* Writing */

2019-06-30T07:51:27Z

‎Writing

Jacobly: /* Writing */

2019-06-30T07:50:58Z

‎Writing

Jacobly: /* Writing */

2019-06-30T07:50:44Z

‎Writing

Jacobly at 07:50, 30 June 2019

2019-06-30T07:50:32Z

Jacobly: Created page with "Serial Flash Commands The Python Edition calculator contains a new serial flash chip with an entirely new interface. For pre-Py..."

2019-06-30T07:49:21Z

Created page with "Serial Flash Commands The Python Edition calculator contains a new serial flash chip with an entirely new interface. For pre-Py..."

New page

[[Category:84PCE:General_Hardware_Information|Serial Flash Commands]]
The Python Edition calculator contains a new serial flash chip with an entirely new interface. For pre-Python calculators see the old [[83Plus:OS:Raw_Flash_Commands|parallel interface]].

For reference, pages are 256 bytes, sectors are 4KB, and blocks are 64KB.

== Basic Flash Commands ==
You write a command to the range $E00800-$E0080F and then wait until $E00824 bit 0 is set at which point you acknowledge by setting the same bit.

=== Erasing ===
<pre>
00000000 00000001 00000000 02000006 |
XXXXXXXX 03000001 00000000 020000D8 | X is the address of the block to erase.
00000000 00000001 00000000 04000005 |
</pre>

=== Writing ===
Writes can only happen within a single page at a time.

<pre>
00000000 00000001 00000000 02000006 |
XXXXXXXX 03000001 YYYYYYYY 42000032 | X is the address to write to, Y is the number of bytes to write (maximum 256)
Write each byte to $E00900, followed by a normal wait.
</pre>

← Older revision		Revision as of 09:35, 30 June 2019
Line 38:		Line 38:

	Afterwards, wait for $E00818 bit 1 to be set and read register value from $E00900.		Afterwards, wait for $E00818 bit 1 to be set and read register value from $E00900.
		+
		+	=== Read Unique ID ===
		+	<pre>
		+	00000000 00000401 08000000 0000004B
		+	</pre>
		+
		+	Afterwards, wait for $E00818 bit 1 to be set and read id from $E00900 8 times.
		+
		+	=== Read Device ID ===
		+	<pre>
		+	00000000 03000411 02000000 8000B094
		+	</pre>
		+
		+	Afterwards, wait for $E00818 bit 1 to be set and read id from $E00900 2 times, which should read $EF $15.

← Older revision		Revision as of 09:00, 30 June 2019
Line 29:		Line 29:

	Afterwards, write each byte to $E00900, followed by a normal wait.		Afterwards, write each byte to $E00900, followed by a normal wait.
		+
		+	=== Read Status Register ===
		+	<pre>
		+	00000000 00000001 01000000 000000XX
		+	</pre>
		+
		+	X is $05 for register 1, $35 for register 2, or $15 for register 3.
		+
		+	Afterwards, wait for $E00818 bit 1 to be set and read register value from $E00900.

@@ Line 4: / Line 4: @@
 For reference, pages are 256 bytes, sectors are 4KB, and blocks are 64KB.
-Data sheet is [https://www.winbond.com/resource-files/w25q32jv%20spi%20revc%2008302016.pdf here].
+Datasheet for the W25Q32JV is [https://www.winbond.com/resource-files/w25q32jv%20spi%20revc%2008302016.pdf here].
 == Basic Flash Commands ==

← Older revision		Revision as of 08:02, 30 June 2019
Line 3:		Line 3:

	For reference, pages are 256 bytes, sectors are 4KB, and blocks are 64KB.		For reference, pages are 256 bytes, sectors are 4KB, and blocks are 64KB.
		+
		+	Data sheet is [https://www.winbond.com/resource-files/w25q32jv%20spi%20revc%2008302016.pdf here].

	== Basic Flash Commands ==		== Basic Flash Commands ==

@@ Line 24: / Line 24: @@
 X is the address to write to.
-Y is the number of bytes to write (maximum 256).
+Y is the number of bytes to write, at most the number of bytes remaining in the page.
 Afterwards, write each byte to $E00900, followed by a normal wait.

@@ Line 1: / Line 1: @@
 [[Category:84PCE:General_Hardware_Information|Serial Flash Commands]]
-The Python Edition calculator contains a new serial flash chip with an entirely new interface. For pre-Python calculators see the old [[83Plus:OS:Raw_Flash_Commands|parallel interface]].
+CE calculators in hardware revision M and later (which corresponds to the Python Edition for the 83PCE) contain a new serial flash chip with an entirely new interface. For pre-Python calculators see the old [[83Plus:OS:Raw_Flash_Commands|parallel interface]].
 For reference, pages are 256 bytes, sectors are 4KB, and blocks are 64KB.

@@ Line 22: / Line 22: @@
 XXXXXXXX 03000001 YYYYYYYY 42000032
 </pre>
-X is the address to write to, Y is the number of bytes to write (maximum 256).
+X is the address to write to.
 Afterwards, write each byte to $E00900, followed by a normal wait.

@@ Line 9: / Line 9: @@
 === Erasing ===
 <pre>
-00000000 00000001 00000000 02000006 |
+00000000 00000001 00000000 02000006
-XXXXXXXX 03000001 00000000 020000D8 | X is the address of the block to erase.
+XXXXXXXX 03000001 00000000 020000D8
-00000000 00000001 00000000 04000005 |
+00000000 00000001 00000000 04000005
 </pre>
 === Writing ===
@@ Line 18: / Line 19: @@
 <pre>
-00000000 00000001 00000000 02000006 |
+00000000 00000001 00000000 02000006
-XXXXXXXX 03000001 YYYYYYYY 42000032 | X is the address to write to, Y is the number of bytes to write (maximum 256)
+XXXXXXXX 03000001 YYYYYYYY 42000032
-Write each byte to $E00900, followed by a normal wait.
 </pre>