NEC Network Controller uPD98502 - Manual (Page 186)

CHAPTER 3 SYSTEM CONTROLLER
186 Preliminary User’s Manual S15543EJ1V0UM
• 66-MHz IBUS clock rate
• Supports 266-MB/sec (32 bits @66 MHz) bursts on IBUS.
• Support endian conversion between memory and IBUS slave I/F
• Support endian conversion between SyaAD bus and IBUS master I/F
3.1.4 UART
• Universal Asynchronous Receiver/Transmitter
• Modem control functions
• Even, odd or no parity bit generation
• Fully prioritized interrupt control
3.1.5 EEPROM
• 165/250-kHz clock rate (Depend on CPU clock rate ; 66/100 MHz)
• Support only 3.3-V EEPROM (Recommended National Semiconductor’s “NM93C46”)
• Support Micro Wire interface for Serial EEPROM
• Support auto-load function for two addresses of MAC at system boot
3.1.6 Timer
• Two 32-bit loadable general-purpose timers generating interrupt to CPU
3.1.7 Interrupt controller
• Generates NMI and INT
• All interrupt causing events maskable
3.1.8 DSU (Deadman’s SW Unit)
• Deadman’s SW Unit generates cold reset to CPU