Electronic Components Datasheet Search |
|
MSM6575L Datasheet(PDF) 9 Page - OKI electronic componets |
|
MSM6575L Datasheet(HTML) 9 Page - OKI electronic componets |
9 / 13 page 9/13 MSM6545/6575/6545L/6575L ¡ Semiconductor NOTES ON USE Power Supply for 0.9 V Microcontroller Series (Backup Flag and Constant-Voltage Circuit) The 0.9 V devices have a built-in constant-voltage circuit. The output of this constant-voltage circuit powers the microcontroller's internal logic circuits. Setting a backup flag (BUF) allows the input of the constant voltage circuit to be switched to either the battery or the output generated in the voltage converter, based on the battery voltage. A battery voltage of 1.5 V or 3.0 V can be selected. The output (VEE) of the constant-voltage circuit is set at approximately –1.3 V. This allows the current consumed by the internal logic to be limited, irrespective of the battery voltage. However, if the input of the constant voltage circuit is below this set value (approximately – 1.3V), the output (VEE) is equal to the input. The 0.9 V microcontroller can be operated even if the internal voltage (output from the constant voltage circuit) falls to 0.9 V. Setting the backup flag allows a larger operating voltage margin despite changes in internal voltage due to noise. For example, for the 1.5 V specification, setting the backup flag at "0" supplies twice the battery voltage to the constant voltage circuit. Thus, even if the battery voltage falls to 0.9 V, the output voltage (VEE) is maintained at –1.3 V, providing a larger margin of operating voltage of the internal logic circuits, because 1.8 V is applied to the input of the constant-voltage circuit. Figures 1 to 4 show the internal status depending on the backup flag settings for the battery, as well as status features. XTAL VDD (0 V) VSS1 (–1.5 V) VSS2 (–3.0 V) VSS3* (–4.5 V) VEE (About–1.3 V) LCD driver* Voltage converter Backup flag (BUF) Constant voltage circuit VR Internal logic XT XTB * The VSS3 pin is provided for the devices that contain an LCD driver. |
Similar Part No. - MSM6575L |
|
Similar Description - MSM6575L |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |