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--- telephony:ta1232_td816_td1232_hw_arch [2025/04/19 23:12] – [CPU and general architecture] prppedro
+++ telephony:ta1232_td816_td1232_hw_arch [2025/04/19 23:42] (current) – [Memory] prppedro
@@ Line 11: / Line 11: @@
 {{ :telephony:toshiba_tmp68301af-12_cpu.jpg?400 |}}
-While the CPU might be different between versions (newer models do operate at 12 MHz, in contraposition to older models at 8 MHz), the pinout seems to be largely the same in all three versions.
+While the CPU might be different between versions (newer KX-TD models do operate at 12 MHz, in contraposition to older models at 8 MHz), the pinout seems to be largely the same in all three versions.
 ^ KX-TD1232CE/1232BX etc.               ^ KX-TD816E (UK)                      ^ KX-TA1232                                                                     ^
@@ Line 21: / Line 21: @@
 {{ :telephony:rom_ram_rtc_td1232ce.png?600 |}}
-Those systems seem to be typically equipped with four RAM and two ROM chips. TA1232's Service Manual seems to suggest they might not be always populated. On my TD816BX, [[telephony:td816bx_hardware|they are]]. Intriguingly enough, they didn't ............
 {{ :telephony:ram_not_mounted_ta1232.png?400|}}
+Those systems seem to be typically equipped with four RAM and two ROM chips. TA1232's Service Manual seems to suggest they might not be always populated. On my TD816BX, [[telephony:td816bx_hardware|they are]]. Since this is a purpose built embedded computer, rather than a general computer, we got SRAM chips soldered to exactly the number of lines they need, without room for larger chips.
+I couldn't ascertain why the heck we have two small 32K chips as the first two SRAM IC's, although I find quite interesting the fact that the configuration dump does result in a file that's approximately 64 KB in size, and I remember reading somewhere that those systems hold the configuration in the SRAM's. How this is holding up after all those years scapes me, but the battery I thought to be specific to the RTC may have something to do with this.
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