SH7751 Datasheet, PDF (17/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Item
Page Revision (See Manual for Details)
9.1.1 Types of Power- 239
Down Modes
Description amended
• Module standby function (TMU, RTC, SCI/SCIF, DMAC,
SQ, and UBC)
9.2.4 Standby Control 245
Register 2 (STBCR2)
Description amended
For details regarding the SH7751, see section 4.7, Store
Queues.
9.6.2 Exit from Standby 251
Mode
9.8.1 Transition to 253
Hardware Standby
Mode
Notes amended
Notes: 1. Only when the RTC clock (32.768 kHz) is operating
(see section 19.2.2, IRL Interrupts), standby mode
can be exited by means of IRL3–IRL0 (when the
IRL3–IRL0 level is higher than the SR register
IMASK mask level).
2. GPIC can be used to cancel standby mode when
the RTC clock (32.768 kHz) is operating (when the
GPIC level is higher than the SR register IMASK
mask level).
Description amended
3. On the SH7751, the RTC continues to operate even when
no power is supplied to power pins other than the RTC
power supply pin.
9.8.2 Exit from
Hardware Standby
Mode
253, 254 Description replaced
Hardware standby mode can only be cancelled by a power-on
reset. Driving the CA pin high when the RESET pin is being
driven low causes clock oscillation to start. At this point,
maintain the RESET pin at low level until clock oscillation
stabilizes. The CPU will start power-on reset processing if the
RESET pin is driven high. Hardware standby mode cannot be
cancelled by an interrupt or a manual reset.
9.8.3 Usage Notes 254
Description added
1. The CA pin level must be kept high when the RTC
power supply is started (figure 9.15).
2. On the SH7751R, supply power to the V , V , V ,
DD DDQ DD-CPG
V , _DD−PLL1 and V_DD-PLL2 power supply pins in addition to the RTC
power supply pin in hardware standby mode.
Rev.4.00 Oct. 10, 2008 Page xvii of xcviii
REJ09B0370-0400