32186 datasheet(809/1032 Pages) RENESAS

809 / 1032 page

NON-BREAK DEBUG (NBD)

16-11

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

EVTU_A, EVTU_C

information

Address bus,

R/W signal information

Output "L" when

a match is detected

NBDEVNT# pin

Also output "L"

by writing any data

NEVNTGEN

Comparate

circuit

Output "L" for 2BCLK

Figure 16.6.1 NBDEVNT# Pin Configuration

16.6 Event Detection Function

The NBD has the function to output an event occurrence when there is a matching address accessed for read/write in the

CPU space. The event output is active "L," and is asserted synchronously with BCLK for a period of 2 BCLK cycles.

The NBDEVNT# pin also can output "L" level signal for 2 BCLK cycles when the NEVNTGEN register located in

the CPU space is accessed for write. Output from the NBDEVNT# pin is generated by matching the above-

mentioned address or a write access to the NEVNTGEN register

Figure 16.6.1 shows the structure of the NBDEVNT# pin.

16.6.1 Event Address Setting Register

Event Address Setting Register (EVTU_A)

<Address: H'800–H'803 (NBD space)>

b15

EVTU_A

????????????????

b16

b31

EVTU_A

??????????????

Bit Name

Function

0–29

EVTU_A

Specify the target address A0–A29 for event detection

30, 31

No function assigned. Fix to "0."

Notes: • In the NBDEN bit of NBD enable register (NBDENB), AVTU_A bit value becomes indefinite after setting from "0" (disable

NBD operation) to "1"(enable NBD operation).

• After enabling NBD operation(after setting "1"in NBDEN bit of NBDENB register), an indefinite value is outputted from

NBDEVENT# pin in NBD pin control register(NBDCNT) during the period of time from setting NBD-related pins to NBD

function to setting value of EVTU_A and EVTU_C are effective(period of time from Ready status to after 3NBDCLK).

• During event detection function is used, when the setting value of EVTU_A register or EVTU_C register is changed, the

event detection result by the changed setting conditions becomes effective after 3NBDCLK from setting EVTU_A

16.6 Event Detection Function

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