Eval » Historie » Revision 20
Revision 19 (Maximilian Seesslen, 07.04.2022 14:24) → Revision 20/57 (Maximilian Seesslen, 07.04.2022 14:28)
h1. Eval
h2. Hardware
Display: WSH-12561; 37,32x31,8; 200x200Pixel; eval board funktioniert
Akku: 31063 (Garmin Fenix 3) 300mAh; 300 mAh; 31,6 x 24,8 x 4,3
h2. MCU
Pixel-data is 5KB ((200*200)/8); need bigger MCU; but the STM32L433CCU6 i have is too much
STM32L433CCU6: Too much
STM32L151C6U6A waers eigentlich. USB, -128KB Flash, 32KB SRAM-, EEPROM 32KB Flash, 10KB RAM, hat USB
STM32L051C8T6; no USB
STM32L053C8T6; 11,60Euro, whatt?
STM32L151C6U6A hab ich schon "hier":http://hase.seesslen.net/redmine/projects/hw-temprec/wiki/STM32#Warehouse. STM32L151CB gibts auch noch, wenn auch teure 12.15Euro.
Check the binary size. Along with USB.
* Fonts, USB, Terminal, Debug, LUT: 29616
* Fonts, USB, Terminal, RelWIthDebug, LUT: 22884
Alphabet: 22 Zeichen * 8 Bytes= 176 Bytes. Display-Content 5000 Bytes.
32KByte koennten reichen. Versions on Display optional.
4KByte EEPROM fuer Settings.
h2. Power
Lade-Chip: https://www.mouser.de/datasheet/2/268/MCP73871_Data_Sheet_DS20002090F-2932254.pdf
VCI wants 3V3. VDDIO may be less but is not specified. Reference schematics connects VDDIO directly to VCI.
Start with 3V3.
"ad_mcp73871" is getting manufactured. Lets see how it behaves on V_OUT.
V_OUT is ok. But there is no discharge protection. Additional chip needed like:
* AP9211; normal 3.0μA (Typ.), 4.5μA (Max.); Power-Down 0.1μA
"Chip":https://www.tme.eu/de/katalog/batterie-u-akku-controller-schaltungen_112884/?s_field=1000014&s_order=asc&limit=20¤cy=EUR&products_with_stock=1&page=1
h2. Open points
MCU: 1.65 V to 3.6 V power supply, would need LDO. Would need this self-holding-mosfet chain. Would need seperate battery for RTC. MCU has not VBAT.
There are low IQ LDOs. "((48*1000)/1,6) / 24 / 356" = 3,511236 years.
ADC can also be connected directly. Stop working at 3V. There is no "Low-Battery" signal on the ordered revision of the MCP73871.
h2. Protection
* AP9211SA-AL-HAC-7
"Link":https://electronics.stackexchange.com/questions/496609/protection-ic-stopping-battery-from-charging
2x NMOS, 20V, 2A
h2. Tests
* Run with Battery < 3V;
** -Is Shutdown of MCP73871 working- No, need additional part; AP9211SA-AL-HAC-7, AP9101CAK6-ANTRG1.
** Is Low-Battery-Detection implemented on STM32 working?
h2. Actions
* -ad_mcp73871-
* ad_mcp73871_2; Ohne das Switch-gedoens. Mit ADC Ausgang. Wiederstaende muessen ja noch nicht passen.
h2. Hardware
Display: WSH-12561; 37,32x31,8; 200x200Pixel; eval board funktioniert
Akku: 31063 (Garmin Fenix 3) 300mAh; 300 mAh; 31,6 x 24,8 x 4,3
h2. MCU
Pixel-data is 5KB ((200*200)/8); need bigger MCU; but the STM32L433CCU6 i have is too much
STM32L433CCU6: Too much
STM32L151C6U6A waers eigentlich. USB, -128KB Flash, 32KB SRAM-, EEPROM 32KB Flash, 10KB RAM, hat USB
STM32L051C8T6; no USB
STM32L053C8T6; 11,60Euro, whatt?
STM32L151C6U6A hab ich schon "hier":http://hase.seesslen.net/redmine/projects/hw-temprec/wiki/STM32#Warehouse. STM32L151CB gibts auch noch, wenn auch teure 12.15Euro.
Check the binary size. Along with USB.
* Fonts, USB, Terminal, Debug, LUT: 29616
* Fonts, USB, Terminal, RelWIthDebug, LUT: 22884
Alphabet: 22 Zeichen * 8 Bytes= 176 Bytes. Display-Content 5000 Bytes.
32KByte koennten reichen. Versions on Display optional.
4KByte EEPROM fuer Settings.
h2. Power
Lade-Chip: https://www.mouser.de/datasheet/2/268/MCP73871_Data_Sheet_DS20002090F-2932254.pdf
VCI wants 3V3. VDDIO may be less but is not specified. Reference schematics connects VDDIO directly to VCI.
Start with 3V3.
"ad_mcp73871" is getting manufactured. Lets see how it behaves on V_OUT.
V_OUT is ok. But there is no discharge protection. Additional chip needed like:
* AP9211; normal 3.0μA (Typ.), 4.5μA (Max.); Power-Down 0.1μA
"Chip":https://www.tme.eu/de/katalog/batterie-u-akku-controller-schaltungen_112884/?s_field=1000014&s_order=asc&limit=20¤cy=EUR&products_with_stock=1&page=1
h2. Open points
MCU: 1.65 V to 3.6 V power supply, would need LDO. Would need this self-holding-mosfet chain. Would need seperate battery for RTC. MCU has not VBAT.
There are low IQ LDOs. "((48*1000)/1,6) / 24 / 356" = 3,511236 years.
ADC can also be connected directly. Stop working at 3V. There is no "Low-Battery" signal on the ordered revision of the MCP73871.
h2. Protection
* AP9211SA-AL-HAC-7
"Link":https://electronics.stackexchange.com/questions/496609/protection-ic-stopping-battery-from-charging
2x NMOS, 20V, 2A
h2. Tests
* Run with Battery < 3V;
** -Is Shutdown of MCP73871 working- No, need additional part; AP9211SA-AL-HAC-7, AP9101CAK6-ANTRG1.
** Is Low-Battery-Detection implemented on STM32 working?
h2. Actions
* -ad_mcp73871-
* ad_mcp73871_2; Ohne das Switch-gedoens. Mit ADC Ausgang. Wiederstaende muessen ja noch nicht passen.