14.5.3.1 Device Configuration
In Fast Flash Programming mode, the device is in a specific test mode. Only a certain set of pins is significant. The rest of the PIOs are used as inputs with a pull-up. The crystal oscillator is in bypass mode. Other pins must be left unconnected.
The figure and table below provide details on the signals and power supplies used when FFPI is implemented.
| Signal Name | PIO Lines | Function | Type | Active Level | Comments |
|---|---|---|---|---|---|
| Power | |||||
| VDD3V3 | – | I/O Lines and Main Power Supplies Input | Power | – | Connect to 3.3V |
| VBAT | – | Backup Area and Backup I/O Lines Power Supply Input | Power | – | Connect to 3.3V |
| VDDCORE | – | Core Power Supply Input | Power | – | Connect to 1.1V |
| VDDPLL | – | PLL Power Supply Input | Power | – | Connect to 1.1V |
| GND | – | Ground | Ground | – | Connect to GND |
| Clocks | |||||
| XIN | PA29 | Main Clock Input | Input | – | 3.3V Square wave signal from 10 to 50 MHz |
| Test | |||||
| TST | – | Test Mode Select | Input | High | Must be at high (3.3V) during power-up, then low (0V) after reset period. |
| JTAGSEL | – | JTAG Test Mode Select | Input | High | Must be at high (3.3V) during power-up, then low (0V) after reset period. |
| PIO | |||||
| #CMD | PA8 | Valid command available | Input | Low | Pulled-up input at reset |
| RESP | PB26 | Error Response | Output | – | Pulled-up input at reset |
| RDY | PB24 |
0: Device is busy 1: Device is ready for a new command | Output | High | Pulled-up input at reset |
| #OE | PA9 |
Output Enable (active low) 0: the host releases the DATA[15:0] lines and asks the target device to drive them 1: the host drives the DATA[15:0] lines
| Input | Low | Pulled-up input at reset |
| #VALID | PB25 |
When #OE is 0, #VALID is 0 if a valid data can by read by the host from DATA[15:0] and #VALID is 1 if the data on DATA[15:0] is not valid yet. When #OE is 1, the target device rises #VALID to 1
| Output | Low | Pulled-up input at reset |
| MODE0 | PA23 | Specifies DATA type | Input | – | Pulled-up input at reset |
| MODE1 | PA24 | ||||
| MODE2 | PA25 | ||||
| DATA0 | PA4 | Bi-directional data bus | Input/Output | – | Pulled-up input at reset |
| DATA1 | PA5 | ||||
| DATA2 | PA6 | ||||
| DATA3 | PA7 | ||||
| DATA4 | PB3 | ||||
| DATA5 | PB4 | ||||
| DATA6 | PB9 | ||||
| DATA7 | PB10 | ||||
| DATA8 | PB11 | ||||
| DATA9 | PB12 | ||||
| DATA10 | PC10 | ||||
| DATA11 | PC11 | ||||
| DATA12 | PC12 | ||||
| DATA13 | PC13 | ||||
| DATA14 | PC14 | ||||
| DATA15 | PC15 | ||||