TMPR4956C datasheet(233/286 Pages) TOSHIBA

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Chapter 12 TX4956 Processor Interrupts

12-1

12. TX4956 Processor Interrupts

Five types of interrupt are available on the TX4956. These are:

one non-maskable interrupt, NMI

six external interrupts

seven interrupts by external write through SysAD[6:0]

two software interrupts

one timer interrupt

Figure 12.1.1 shows TX4956 interrupt control circuit.

Note:

Interrupt register can be accessed by external write requeset through system interface.

Please see Chapter 11, “TX4956 System interface” in detail.

Figure 12.1.1 TX4956 Interrupt Control Circuit

Int0*

Int1*

Int2*

Int3*

NMI*

Int4*

Int5*

Interrupt Register

SysAD

Timer Interrupt

Tint Dis

TX4956 Interrupt

AND

AND-OR

function

NMI

External

Interrupts

Nonmaskable

Interrupt

Software

Interrupts

by external write

through

SysAD[6:0]

function

IP7

IP6

IP5

IP4

IP3

IP2

IP1

IP0

H: INT5*

L: Timer Interrupt

Cause Register[15:8]

IM0

IM1

IM2

IM3

IM4

IM5

IM6

IM7

EXL

ERL

/SysAD[5]

(Buffer)

Status Register[0]

Status Register[1]

Status Register[2]

Status Register[15:8]

TMPR4956C Datasheet(PDF) 233 Page - Toshiba Semiconductor

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