
NS9750B-A1 Features
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3
Peripheral bus:
One 13-channel DMA engine supports USB
device
– 2 DMA channels support control
endpoint
– 11 DMA channels support 11 endpoints
One 12-channel DMA engine supports:
– 4 serial modules (8 DMA channels)
– 1284 parallel port (4 DMA channels)
All DMA channels support fly-by mode
External peripheral:
One 2-channel DMA engine supports
external peripheral connected to memory
bus
Each DMA channel supports memory-to-
memory transfers
Power management (patent pending)
Power save during normal operation
– Disables unused modules
Power save during sleep mode
– Sets memory controller to refresh
– Disables all modules except selected
wakeup modules
– Wakeup on valid packets or characters
Vector interrupt controller
Decreased bus traffic and rapid interrupt
service
Hardware interrupt prioritization
General purpose timers/counters
16 independent 16-bit or 32-bit
programmable timers or counters
– Each with an I/O pin
Mode selectable into:
– Internal timer mode
– External gated timer mode
– External event counter
Can be concatenated
Resolution to measure minute-range
events
Source clock selectable: internal clock or
external pulse event
Each can be individually enabled/disabled
System timers
Watchdog timer
System bus monitor timer
System bus arbiter timer
Peripheral bus monitor timer
General purpose I/O
50 programmable GPIO pins (muxed with
other functions)
Software-readable powerup status
registers for every pin for customer-
defined bootstrapping
External interrupts
4 external programmable interrupts
– Rising or falling edge-sensitive
– Low level- or high level-sensitive
Clock generator
On-chip phase locked loop (PLL)
Software programmable PLL parameters
Optional external oscillator
Separate PLL for USB
Operating grades/Ambient temperatures
200 MHz: 0 – 70° C
162 MHz: -40 – +85° C
125 MHz: 0 – 70° C
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