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Port | Width | Mode | Data Type | Interface | Description |
|---|---|---|---|---|---|
clk | 1 | In | standard logic | user logic | System clock |
reset_n | 1 | In | standard logic | user logic | Asynchronous active low reset |
scl | 1 | inout | standard logic | RTCC Pmod | Serial clock of I2C bus |
sda | 1 | inout | standard logic | RTCC Pmod | Serial data of I2C bus |
i2c_ack_err | 1 | out | standard logic | user logic | I2C communication error flag: '0' = no communication error, '1' = the RTCC Pmod did not properly acknowledge a transaction |
set_clk_ena | 1 | In | standard logic | user logic | Set clock enable; toggling this bit to '1' for a system clock cycle latches in the input clock settings and initiates a transaction with the RTCC to set the time and date, and to start the RTCC onboard oscillator to begin timekeeping |
set_seconds | 7 | In | standard logic vector | user logic | Seconds input clock setting; 2 digits in BCD format (00 to 59) |
set_minutes | 7 | In | standard logic vector | user logic | Minutes input clock setting; 2 digits in BCD format (00 to 59) |
set_hours | 5 | In | standard logic vector | user logic | Hours input clock setting; 2 digits in BCD format (00 to 12) |
set_am_pm | 1 | In | standard logic | user logic | AM/PM input clock setting; AM = '0', PM = '1' |
set_weekday | 3 | In | standard logic vector | user logic | Weekday input clock setting; 1 digit in BCD format (1 to 7) |
set_day | 6 | In | standard logic vector | user logic | Day of month input clock setting; 2 digits in BCD format (01 to 31) |
set_month | 45 | In | standard logic vector | user logic | Month input clock setting; 2 digits in BCD format (00 to 12) |
set_year | 8 | In | standard logic vector | user logic | Year input clock setting; 2 digits in BCD format (00 to 99) |
set_leapyear | 1 | In | standard logic | user logic | Set leapyear ('1') or not a leapyear ('0') |
seconds | 7 | out | standard logic vector | user logic | Seconds clock output; 2 digits in BCD format (00 to 59) |
minutes | 7 | out | standard logic vector | user logic | Minutes clock output; 2 digits in BCD format (00 to 59) |
hours | 5 | out | standard logic vector | user logic | Hours clock output; 2 digits in BCD format (00 to 12) |
am_pm | 1 | out | standard logic | user logic | AM/PM clock output; AM = '0', PM = '1' |
weekday | 3 | out | standard logic vector | user logic | Weekday clock output; 1 digit in BCD format (1 to 7) |
day | 6 | out | standard logic vector | user logic | Day of month clock output; 2 digits in BCD format (01 to 31) |
month | 45 | out | standard logic vector | user logic | Month clock output; 2 digits in BCD format (00 to 12) |
year | 8 | out | standard logic vector | user logic | Year clock output; 2 digits in BCD format (00 to 99) |
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