H-Udi Interrupt; Bypass; Using H-Udi To Recover From Sleep Mode; Boundary Scan - Hitachi SH7709S Hardware Manual

H-UDI reset assert
SDIR
Chip internal reset
CPU state
22.4.4

H-UDI Interrupt

The H-UDI interrupt function generates an interrupt by setting a command from the H-UDI in the
SDIR. An H-UDI interrupt is a general exception/interrupt operation, resulting in a branch to an
address based on the VBR value plus offset, and with return by the RTE instruction. This interrupt
request has a fixed priority level of 15.
H-UDI interrupts are not accepted in sleep mode or standby mode.
22.4.5

Bypass

The JTAG-based bypass mode for the H-UDI pins can be selected by setting a command from the
H-UDI in SDIR.
22.4.6

Using H-UDI to Recover from Sleep Mode

It is possible to recover from sleep mode by setting a command (0001) from the H-UDI in SDIR.
22.5

Boundary Scan

A command can be set in SDIR by the H-UDI to place the H-UDI pins in the boundary scan mode
stipulated by JTAG.
22.5.1

Supported Instructions

This LSI supports the three essential instructions defined in the JTAG standard (BYPASS,
SAMPLE/PRELOAD, and EXTEST).
BYPASS: The BYPASS instruction is an essential standard instruction that operates the bypass
register. This instruction shortens the shift path to speed up serial data transfer involving other
H-UDI reset negate
Figure 22.3 H-UDI Reset
Branch to H'A0000000
657