ST7MC1K2-Auto datasheet(334/371 Pages) STMICROELECTRONICS

334 / 371 page

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Product(s)

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Electrical characteristics

ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto

334/371

Figure 146. RESET pin protection when LVD is disabled(1)

- The reset network protects the device against parasitic resets.

- The output of the external reset circuit must have an open-drain output to drive the ST7 reset pad. Otherwise the device

can be damaged when the ST7 generates an internal reset (LVD, illegal opcode or watchdog).

- Whatever the reset source is (internal or external), the user must ensure that the level on the RESET pin can go below the

VIL max. level specified in Section 12.9.1: Asynchronous RESET pin on page 332. Otherwise the reset is not taken into

account internally.

- Because the reset circuit is designed to allow the internal RESET to be output in the RESET pin, the user must ensure

that the current sunk on the RESET pin is less than the absolute maximum value specified for IINJ(RESET) in Section 12.2.2:

Current characteristics on page 314.

Please refer to Section 11.2.2: Illegal opcode reset on page 309 for more details on illegal opcode reset conditions

12.9.2

ICCSEL/VPP pin

Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.

Figure 147. Two typical applications with VPP pin

(1)

When the ICC mode is not required by the application, the ICCSEL/VPP pin must be tied to VSS.

Table 212.

ICCSEL/VPP pin

Symbol

Parameter

Conditions

Min

Max

Unit

VIL

Input low level voltage(1)

Data based on design simulation and/or technology characteristics, not tested in production.

VSS

0.2

VIH

Input high level voltage(1)(2)

2. VPP is also used to program the Flash (refer to the Flash characteristics).

ICC mode entry

VDD - 0.1

12.6

Input leakage current

VIN =VSS

±1

µA

0.01µF

external

reset

circuit

User

Required

Pulse

generator

Filter

RON

VDD

Watchdog

Internal

reset

Illegal opcode(2)

ST7MC1K2-Auto

ST7MC1K6-Auto

ST7MC2S4-Auto

ST7MC2S6-Auto

ICCSEL/VPP

10k

Ω

Programming

tool

VPP

ST7MC1K2-Auto

ST7MC1K6-Auto

ST7MC2S4-Auto

ST7MC2S6-Auto

ST7MC1K2-Auto

ST7MC1K6-Auto

ST7MC2S4-Auto

ST7MC2S6-Auto

Obsolete

Product(s)

- Obsolete

Product(s)

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