UCD3138ARMHT datasheet(29/83 Pages) TI

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UCD3138A

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SLUSC66B – MARCH 2015 – REVISED MAY 2015

6.4.2

Memory Management Controller (MMC)

The MMC manages the interface to the peripherals by controlling the interface bus for extending the read

and write accesses to each peripheral. The unit generates eight peripheral select lines with 1 kB of

address space decoding.

6.4.3

System Management (SYS)

The SYS unit contains the software access protection by configuring user privilege levels to memory or

peripherals modules. It contains the ability to generate fault or reset conditions on decoding of illegal

address or access conditions. A clock control setup for the processor clock (MCLK) speed, is also

available.

6.4.4

Central Interrupt Module (CIM)

The CIM accepts 32 interrupt requests for meeting firmware timing requirements. The ARM processor

supports two interrupt levels: FIQ and IRQ. FIQ is the highest priority interrupt. The CIM provides

hardware expansion of interrupts by use of FIQ/IRQ vector registers for providing the offset index in a

vector table. This numerical index value indicates the highest precedence channel with a pending interrupt

and is used to locate the interrupt vector address from the interrupt vector table. Interrupt channel 0 has

the lowest precedence and interrupt channel 31 has the highest precedence. To remove the interrupt

request, the firmware should clear the request as the first action in the interrupt service routine. The

request channels are maskable, allowing individual channels to be selectively disabled or enabled.

Table 6-1. Interrupt Priority Table

MODULE COMPONENT OR

NAME

DESCRIPTION

PRIORITY

BRN_OUT_INT

Brownout

Brownout interrupt

0 (lowest)

EXT_INT

External interrupts

Interrupt on external input pin

WDRST_INT

Watchdog control

Interrupt from watchdog exceeded (reset)

Wakeup interrupt when watchdog equals half of set

WDWAKE_INT

Watchdog control

watch time

SCI_ERR_INT

UART or SCI control

UART or SCI error Interrupt. Frame, parity or overrun

SCI_RX_0_INT

UART or SCI control

UART0 RX buffer has a byte

SCI_TX_0_INT

UART or SCI control

UART0 TX buffer empty

SCI_RX_1_INT

UART or SCI control

UART1 RX buffer has a byte

SCI_TX_1_INT

UART or SCI control

UART1 TX buffer empty

PMBUS_INT

PMBus related interrupt

DIG_COMP_INT

12-bit ADC control

Digital comparator interrupt

“Prebias complete”, “Ramp Delay Complete”, “Ramp

FE0_INT

Front End 0

Complete”, “Load Step Detected”,

“Over-Voltage Detected”, “EADC saturated”

“Prebias complete”, “Ramp Delay Complete”, “Ramp

FE1_INT

Front End 1

Complete”, “Load Step Detected”,

“Over-Voltage Detected”, “EADC saturated”

“Prebias complete”, “Ramp Delay Complete”, “Ramp

FE2_INT

Front End 2

Complete”, “Load Step Detected”,

“Over-Voltage Detected”, “EADC saturated”

PWM3_INT

16-bit timer PWM 3

16-bit Timer PWM3 counter overflow or compare interrupt

16-bit Timer PWM2 counter Overflow or compare

PWM2_INT

16-bit timer PWM 2

interrupt

PWM1_INT

16-bit timer PWM 1

16-bit Timer PWM1 counter overflow or compare interrupt

PWM0_INT

16-bit timer PWM 0

16-bit Timer PWM1 counter overflow or compare interrupt

OVF24_INT

24-bit timer control

24-bit Timer counter overflow interrupt

DTC_FLT_INT

DTC fault interrupt

DTC module fault interrupt

COMP_1_INT

24-bit timer control

24-bit Timer compare 1 interrupt

Detailed Description

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