LH79520N0M000B1 Sharp Microelectronics, LH79520N0M000B1 Datasheet - Page 18

• Manufacturer Part Number: LH79520N0M000B1
• Description: IC ARM7 BLUESTREAK MCU 176LQFP
• Manufacturer: Sharp Microelectronics
• Series: BlueStreak ; LH7r

Specifications of LH79520N0M000B1

• Rohs Status: RoHS non-compliant
• Core Processor: ARM7
• Core Size: 32-Bit
• Speed: 77.4MHz
• Connectivity: IrDA, Microwire, SPI, SSP, UART/USART
• Peripherals: DMA, LCD, PWM, WDT
• Number Of I /o: 64
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LQFP
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: 425-1820; LH79520N0M000

LH79520
VARIATIONS FROM THE 16C550 UART
16C550 UART device in six ways:
• Receive FIFO trigger levels are fixed at 8 bytes
• Receive errors are stored in the FIFO, and do not
• The internal register map address space and each
ported:
• 1.5 stop bits (1 or 2 stop bits only are supported)
• The forcing stick parity function
• Independent receive clock.
Pulse Width Modulator (PWM)
• Two independent output channels with separate
• Up to 16-bit resolution
• Programmable synchronous mode support
• Programmable pulse width (duty cycle), interval (fre-
Vectored Interrupt Controller
interrupt request signals from 20 internal and eight
external interrupt sources and applies them, after
masking and prioritization, to the IRQ and FIQ interrupt
inputs of the ARM7TDMI processor core.
interrupt vector logic with programmable priority for up
to 16 interrupt sources. This logic reduces the interrupt
response time for IRQ type interrupts compared to
solutions using software polling to determine the high-
est priority interrupt source. This significantly improves
the real-time capabilities of the LH79520 in embedded
control applications.
• 20 internal and eight external interrupt sources
• IRQ interrupt vector logic for up to 16 channels with
• All of the interrupt channels, with the exception of the
18
generate an interrupt.
register’s bit function differ.
input clocks
quency), and polarity
programmable priorities
Watchdog Timer interrupt, can be programmed to
generate:
The UART varies from the industry-standard
The following 16C550 UART features are not sup-
– Allows external input to start PWM
– Static programming: PWM is stopped
– Dynamic programming: PWM is running
– Updates duty cycle, frequency, and polarity at the
– Wide programming range.
The Vectored Interrupt Controller combines the
The Interrupt Controller incorporates a hardware
– Individually maskable
– Status accessible for software polling
end of a PWM cycle
9/10/03
• The Watchdog timer can only generate FIQ interrupt
• External interrupt inputs programmable
requests
– FIQ interrupt request
– Non-vectored IRQ interrupt request (software to
– Vectored IRQ interrupt request (up to 16 chan-
– Edge triggered or level triggered
– Rising edge/active HIGH or falling edge/active
The 28 interrupt channels are shown in Table 4.
CHANNEL
poll IRQ source)
nels total)
LOW
27-29
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
30
31
0
1
2
3
4
5
6
7
8
9
Table 4. Interrupt Channels
External Interrupt 0
External Interrupt 1
External Interrupt 2
External Interrupt 3
External Interrupt 4
External Interrupt 5
External Interrupt 6
External Interrupt 7
Spare Internal Interrupt 0
COMRX (used for debug)
COMTX (used for debug)
SSP RX time-out interrupt SSPRXTO
CLCD Combined Interrupt
SSP SSPTXINTR
SSP SSPRXINTR
SSP SSPRORINTR
SSP SSPINTR
Counter/Timer0
Counter/Timer1
Counter/Timer2
Counter/Timer3
UART ch0 Rx
UART ch0 Tx
UART ch0
UART ch1
UART ch2
DMA Combined
Unused
RTC_ALARM
WDT
INTERRUPT SOURCE
Preliminary Data Sheet
System-on-Chip