M48T129Y, M48T129V

6/30

Figure 5. Hardware Hookup for Equivalent Surface-mount (SMT) Solution

Notes:For pin connections, see individual data sheet for M48T201Y/V www.st.com.

The chip enable access time of the external SRAM will be the combination of the chip enable access for the SRAM itself, plus the chip

1. For 5V, M48T129Y (M48T201Y + 5V 1Mb LPSRAM). For 3.3V, M48T129V (M48T201V + 3V 1Mb LPSRAM).

2. SNAPHAT Top ordered separately.

AI03632

32,768 Hz

CRYSTAL

LITHIUM

CELL

A0-A16

DQ0-DQ7

E

VCC

W

G

WDI

A18

A17

RSTIN1

RSTIN2

VSS

E

W

G

VCC

VSS

A0-A16

DQ0-DQ7

0.1

µF

0.1

µF

5V

ECON

GCON

RST

IRQ/FT

SQW

M48T201Y/V

(1,2)

1Mb LPSRAM

VOUT

SNAPHAT

(2)

BATTERY/CRYSTAL