Zilog EZ80L92 - Manual (Page 56)

eZ80L92 Development Kit
User Manual
DC Characteristics UM012913-0407
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BRG_DLRL0=0x2F; // Baud rate Masterclock/(16*baudrate)
BRG_DLRH0=0x00; // High byte of baud rate
UART_LCTL0=0x00; // Disable dlab
UART_FCTL0=0xC7; // Clear tx fifo, enable fifo
UART_LCTL0=0x03; // 8bit, N, 1 stop
IR_CTL = 0x03; // enable IRDA Encode/decode and Receive
// enable bit.
//IRDA_Xmit
IR_CTL = 0x01; //Disable receive
Putchar(0xb0); //Output a byte to the uart0 port.
DC Characteristics
As different combinations of application modules are loaded on the
eZ80Acclaim!
® Development Platform, current requirements change, see
Table 26 on page 42 to reference current consumption values for different
module combinations.
A 0.1-Farad capacitor is provided on the eZ80L92 Module as a short-term
battery backup for the RTC (see
eZ80L92 Module on page 66 ). The part
number of the capacitor made by Panasonic is EECS0HDV. The capacitor
is connected to RTC_VDD to provide power to the RTC when main
power to the chip is removed; it is also connected to the 3.3 V supply to
the chip for recharging. The RTC can operate down to 3.0 V; it requires
10 µA of current. The (keep alive) time this capacitor can supply power
to the RTC (from 3.3 V to 3.0 V), is approximately 3000 seconds, or 50
minutes.
Flash Loader Utility
The Flash Loader utility resides in the boot sector of Flash memory,
located on the eZ80L92 Module. The Flash Loader utility allows the
operation of the Boot Block utility or jumping to the application code.
Refer to the External Flash Loader Product User Guide (PUG0013) for
more details.